CN112065467B - Underground engineering supporting structure and construction method thereof - Google Patents
Underground engineering supporting structure and construction method thereof Download PDFInfo
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- CN112065467B CN112065467B CN202011006813.3A CN202011006813A CN112065467B CN 112065467 B CN112065467 B CN 112065467B CN 202011006813 A CN202011006813 A CN 202011006813A CN 112065467 B CN112065467 B CN 112065467B
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- 238000010276 construction Methods 0.000 title claims abstract description 68
- 238000009412 basement excavation Methods 0.000 claims abstract description 24
- 239000002689 soil Substances 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims description 13
- 230000002452 interceptive effect Effects 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 15
- 239000004567 concrete Substances 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 239000011150 reinforced concrete Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D13/00—Large underground chambers; Methods or apparatus for making them
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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
- E21D11/08—Lining with building materials with preformed concrete slabs
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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
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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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- 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)
- Architecture (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses an underground engineering supporting structure and a construction method thereof, which solve the problem of high construction risk of the traditional excavation construction method of underground engineering. The invention comprises two advanced pilot holes which are obtained by the underground excavation construction, wherein an arch structure and a bottom plate structure are obtained by the construction between the two advanced pilot holes, and the bottom plate structure is arranged below the arch structure; the combined lining is arranged in the pilot tunnel, and the arch structure and the bottom plate structure are connected with the combined lining. The arrangement of the arch structure can support the top of the excavated soil body, the combined lining supports the two ends of the arch structure synchronously, the whole excavation structure is reinforced, meanwhile, the bearing load of the arch structure is shared, the tunnel structure design is reinforced, and the service life of the tunnel is prolonged.
Description
Technical Field
The invention belongs to the technical field of underground engineering, and particularly relates to an underground engineering supporting structure and a construction method thereof.
Background
The twenty-first century is a century of development and utilization of underground space, and particularly, along with rapid urban development, the transitional development of resources inevitably brings about a series of serious problems such as environmental pollution, energy shortage, traffic congestion, water resource shortage and the like, so that people have to develop underground engineering to relieve the pressure brought by land resource shortage.
The common construction methods for the urban underground engineering construction at present mainly comprise an open cut method, a hidden cut method, a pipe jacking method and the like. Although the open cut method has the advantages of simple construction process, mature technology and the like, the construction of the open cut method requires the whole excavation, repeated traffic untangling and mass pipeline relocation of the ground, and has great influence on social public traffic and environment; the structure form of the subsurface excavation method is flexible and changeable, but the construction speed is low, the mechanization degree is low, and the safety risk is high; the shield and pipe jacking technology is high in mechanization and automation degree, is generally applied to a linear space structure, but is high in construction cost.
Chinese patent (application number: CN 200510031476.2) discloses a prefabricated concrete double-curved thin-shell arch assembled underground engineering structure, which adopts prefabricated concrete, and before the engineering is excavated, prefabricated concrete components conforming to the underground engineering are produced according to the engineering scale to ensure the engineering construction; the supporting structure of this patent needs to produce corresponding prefabricated component according to specific engineering and construct again, and engineering matching degree is low does not have unification work progress complicacy, and can't be adapted to the horizontal large-span space that is greater than 15 m.
Disclosure of Invention
Aiming at the problems of complex construction, low speed, risk or high construction cost of the existing construction method, the invention provides an underground engineering supporting structure and a construction method thereof, and solves the problem of high construction risk of the traditional excavation construction method of the underground engineering.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
an underground engineering supporting structure and a construction method thereof comprise two leading holes which are obtained through underground excavation construction, an arch structure and a bottom plate structure are obtained through construction between the two leading holes, and the bottom plate structure is arranged below the arch structure; the combined lining is arranged in the pilot tunnel, and the arch structure and the bottom plate structure are connected with the combined lining. The arch structure protects soil to be excavated, and is convenient for soil excavation.
The arch structure comprises an arch shell primary supporting structure, supports are arranged in the two combined linings, and the end parts of the arch shell primary supporting structure are correspondingly connected with the two supports; the lower part of the arch shell primary supporting structure is provided with a secondary lining structure, and two ends of the secondary lining structure are respectively and correspondingly connected with the two combined linings. The arrangement of the arch shell primary supporting structure and the secondary lining structure strengthens the bearing capacity of the underground engineering supporting structure.
The hinged support is arranged between the arch shell primary support structure and the support, the hinged support only receives axial force, no bending moment exists, and the shearing force is almost zero, so that the arch load of the arch shell primary support structure is conveniently transmitted through the hinged support, and the stress of the support is clearer.
The bottom plate structure comprises a bottom plate, longitudinal beams are arranged at the bottoms of the two combined linings, and the bottom plate is arranged between the two longitudinal beams.
In order to facilitate the construction of the later-stage auxiliary structure, the lower part of the combined lining is internally provided with backfill materials.
A construction method of an underground engineering structure comprises the following steps:
s1, respectively excavating an originating well and a receiving well;
s2, excavating a pilot tunnel between the originating well and the receiving well respectively, and paving a combined lining in the pilot tunnel;
s3, constructing an arch structure to form an advanced pre-support;
s4, excavating soil in the enclosing area at the lower part of the arch structure to form a central excavation area;
s5, repeatedly executing the step S3 and the step S4 until the excavation of the underground space corresponding to the whole underground engineering structure is completed;
s6, removing the combined lining below the arch structure, and communicating the pilot tunnel with the central excavation area;
s7, constructing a bottom plate structure between the combined lining of the two pilot holes;
s8, constructing the auxiliary structure in the underground space of the completed bottom plate structure.
In step S3, the arch structure includes a shell primary support structure and a secondary lining structure, and the arch structure is applied by the steps of:
s3.1, disassembling a combined lining which is interfered with the arch shell primary support structure;
s3.2, shi Zuogong shell primary support structures, and manufacturing a support between the arch shell primary support structures and the combined lining to form primary support structures of transverse span space;
s3.3, excavating a top construction space under the protection of the arch shell primary support structure;
s3.4, disassembling the combined lining which is interfered with the secondary lining structure, performing construction of the secondary lining structure in a top construction space, and connecting the secondary lining structure and the inner side wall of the combined lining.
In step S3.2, during the manufacture of the support, a hinge support needs to be embedded in the support, and the hinge support and the arch shell primary support structure are connected.
In step S7, the fabrication of the floor structure includes the steps of:
s7.1, leveling a site between two combined linings;
s7.2, constructing a bottom plate in the well-arranged field, and respectively constructing longitudinal beams between the end parts of the bottom plate and the combined lining;
and S7.3, filling backfilling materials into the lower part of the combined lining.
The invention has the beneficial effects that:
the arrangement of the arch structure can support the top of the excavated soil body, the combined lining synchronously supports and reinforces the end part of the arch structure, the bottom plate structure is correspondingly connected with the combined lining, the excavated bottom soil body is protected, the whole excavated structure is further reinforced, the load of the arch structure is shared, the design of the tunnel structure is reinforced, the safety of the construction process is ensured, and the service life of the tunnel is synchronously prolonged; the construction method is simple, quick and convenient, the primary support structure system of the transverse span space provides guarantee for later engineering construction, the risk of engineering construction is reduced, the logic of the construction process is strong, the constructors can realize quick and efficient construction of underground engineering construction under the condition of complex urban construction by gradually constructing according to the method, and meanwhile, the requirements of high-standard construction, safe and efficient production and environment protection required by engineering construction are met.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is a schematic diagram of the locations of an originating well, receiving well and pilot hole.
Fig. 3 is a schematic layout of a pilot tunnel and a modular lining.
Fig. 4 is a schematic diagram of the completion of step S3.2 of example 2.
Fig. 5 is a schematic diagram of the completion of step S3.5 of example 2.
Fig. 6 is a schematic diagram of the completion of step S4 of example 2.
Fig. 7 is a schematic diagram of the completion of step S7 in example 2.
Fig. 8 is a schematic diagram of the completion of step S8 in example 2.
In the figure, 1 is an originating well, 2 is a receiving well, 3 is a pilot hole, 4 is an arch structure, 5 is a combined lining, 6 is an arch shell primary supporting structure, 7 is a support, 8 is a secondary lining structure, 9 is a surrounding area soil body, 10 is a bottom plate, 11 is a longitudinal beam, 12 is a backfill material, and 13 is a hinged support.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.
Example 1: an underground engineering supporting structure, as shown in figure 1, comprises two leading holes 3 which are obtained by underground excavation construction, wherein an arch structure 4 and a bottom plate structure are obtained by construction between the two leading holes 3, and the bottom plate structure is arranged below the arch structure 4; the combined lining 5 is arranged in the pilot tunnel 3, and the arch structure 4 and the bottom plate structure are connected with the combined lining 5. The arch structure can support soil to be excavated, the soil is excavated under the protection of the arch structure when the construction is convenient, the soil is prevented from collapsing in the excavation process, the two combined linings are correspondingly connected with the two ends of the arch structure, the ends of the arch structure are reinforced and supported, and the load is transferred and shared for the arch structure.
The arch structure 4 comprises an arch shell primary supporting structure 6 and a secondary lining structure 8, the secondary lining structure 8 is fixedly arranged at the lower part of the arch shell primary supporting structure 6, and two ends of the arch shell primary supporting structure 6 and the secondary lining structure 8 are respectively arranged in the two combined linings 5 in a penetrating way; the two combined linings 5 are internally provided with the supports 7, two ends of the arch shell primary support structure 6 are correspondingly connected with the two supports 7, the arch crown load is transmitted to the supports 7 through the arch shell primary support structure 6, and the supports 7 are fixedly arranged on the inner side walls of the combined linings, so that the bearing capacity of the whole structure is further enhanced; the end parts of the secondary lining structures 8 are correspondingly connected with the bottoms of the two combined linings. In the embodiment, the arch shell primary supporting structure 6 is arched, the secondary lining structure 8 comprises an arch part 8-1 and a vertical part 8-2, the arch part 8-1 is fixedly arranged right below the arched arch shell primary supporting structure, and the arch part 8-1 is connected with the arched arch shell primary supporting structure in a matching way; the vertical parts 8-2 are symmetrically arranged on two sides of the arch part 8-1, the vertical parts 8-2 are positioned in the combined lining, one end of each vertical part 8-2 is fixedly connected with the end part of the arch part 8-1, and the other end of each vertical part 8-2 is fixedly connected with the bottom of the combined lining. The arch shell primary supporting structure 6 and the secondary lining structure 8 are matched to form a composite design of the underground engineering structure, and the bearing capacity of the top structure is enhanced.
A hinged support 13 is further arranged between the support 7 and the arch shell primary support structure 6, and the hinged support 13 is fixedly buried in the support 7; the hinged support 13 only receives axial force, has no bending moment, and almost has zero shearing force, so that the vault load of the arch shell primary support structure 6 is conveniently transmitted through the hinged support 13, and the stress of the support 7 is more definite.
The combined lining 5 is formed by splicing a plurality of arc lining plates; one end of the combined lining is fixedly connected with the outer side wall of the arch shell primary supporting structure 6, and the other end of the combined lining is fixedly connected with the end part of the bottom plate structure; the combined lining 5 and the support 7 provide structural support for the arch shell primary support structure 6; the two vertical parts 8-2 of the secondary lining structure 8 are respectively and fixedly connected with the bottoms of the combined linings on the two sides, and the combined lining 5 provides structural support for the secondary lining structure 8 synchronously.
The bottom plate structure comprises a bottom plate 10, longitudinal beams 11 are arranged at the bottoms of the inner sides of the two combined linings 5, the bottom plate 10 is paved between the two longitudinal beams 11, the longitudinal beams 11 are fixedly connected with the bottom plate 10 and the combined linings 5 respectively, and the design strength of the bottom structure is enhanced.
And the combined lining 5 is internally provided with a backfill material 12, and the backfill material 12 is horizontally paved so as to facilitate the construction of subsequent underground auxiliary facilities.
In the embodiment, the arch shell primary support structure 6 is made of steel pipes, steel arches or sprayed concrete and other materials; the support 7 is made of cast-in-place concrete, reinforced concrete or steel structure and other materials; the secondary lining structure 8 is made of reinforced concrete or steel fiber concrete and other materials; the combined lining 5 may be a concrete lining, a reinforced concrete lining, a steel fiber concrete lining, or a reinforced concrete-section steel combined lining, etc.
Example 2: a construction method of an underground engineering supporting structure comprises the following steps:
s1, constructing an initiating well 1 and a receiving well 2: as shown in fig. 2, proper positions are selected at two ends of a construction site of an underground project to be built, and an originating well 1 and a receiving well 2 are respectively excavated;
the setting of the originating well 1 and the receiving well 2 can facilitate the hanging in and hanging out of excavating equipment, the jacking construction of the equipment and the entering and exiting of materials, and the sizes of the originating well 1 and the receiving well 2 can be set according to the construction requirement of a heading machine during specific construction.
S2, constructing a pilot tunnel 3: as shown in fig. 3, a pilot tunnel 3 is respectively excavated between an originating well 1 and a receiving well 2, and a combined lining 5 is paved on the inner side wall of the pilot tunnel 3;
the pilot holes 3 are symmetrically arranged at two ends of the originating well 1 and the receiving well 2, and the shape of the pilot holes 3 can be round, rectangular or rectangular-like. The method of shield tunneling machine, pipe pushing machine or manual excavation can be adopted for excavating the pilot tunnel 3 in advance, and the excavation diameter of the pilot tunnel 3 in advance can be determined according to the excavation size of the section and the specific functional requirements of engineering.
The combined lining 5 can be spliced piece by adopting a prefabricated lining or formed at one time by adopting a cast-in-situ mode.
S3, arch structure is implemented: the arch structure 4 is applied to form advanced pre-support, so that the stability of an excavated working surface is ensured;
the arch structure comprises a shell primary support structure 6 and a secondary lining structure 8, and as shown in fig. 4 and 5, the arch structure comprises the following steps:
s3.1, disassembling part of the combined lining: the combined lining interfering with the arch shell primary support structure 6 is detached, so that the post Shi Zuogong shell primary support structure is convenient.
S3.2, constructing an arch shell primary support structure 6: shi Zuogong shell primary support structure 6, a support 7 is manufactured between the arch shell primary support structure 6 and the combined lining 5, a hinged support 13 is embedded in the support 7, and the arch shell primary support structure 6 and the hinged support 13 are connected to form a primary support structure of a transverse span space;
the support 7 is arranged in the pilot tunnel 3 and fixedly connected with the combined lining 5, the support 7 plays a role in supporting the arch shell primary support structure 6, and the arch shell primary support structure 6, the hinged support 13, the support 7 and the combined lining 5 form a primary support structure system of a transverse span space together, so that a guarantee is provided for construction of later engineering.
The arch shell primary support structure 6 can be applied by adopting a curve tube curtain method, a directional drilling machine method, a pre-arch injection method and the like.
S3.3, excavating a construction space: under the protection of the arch shell primary supporting structure 6, excavating a top construction space matched with the secondary lining structure 8 at the lower part of the arch shell primary supporting structure 6;
the top construction space is excavated under the protection of the arch shell primary support structure, so that the stability of an excavated working surface during construction is guaranteed, and the ground subsidence is reduced.
S3.4, performing secondary lining structure 8: disassembling the combined lining 5 interfering with the secondary lining structure 8, and applying the secondary lining structure 8 in a top construction space in a form trolley or concrete extrusion mode, and connecting the secondary lining structure 8 and the inner side wall of the combined lining 5 to further form a supporting structure system of a transverse span space;
two ends of the bottom of the secondary lining structure 8 are respectively and correspondingly fixedly connected with the combined lining 5 at the bottom in the two pilot holes 3, and the combined lining 5 plays a role in supporting the secondary lining structure 8.
S4, excavating soil body 9 in the enclosing area: as shown in fig. 6, excavating soil body 9 of the enclosing area at the lower part of the secondary lining structure 8 by using excavating machinery to form a central excavation area;
the soil body 9 of the enclosing area is formed by enclosing two combined lining 5 and a secondary lining structure 8.
And S5, repeating the step S3 and the step S4 until the excavation of the whole underground space corresponding to the construction site is completed.
S6, communicating excavation areas: as shown in fig. 7, the combined lining 5 interfering with the arch structure 4 below the arch structure 4 is removed, and the pilot tunnel 3 and the center excavation area are communicated.
S7, construction of a bottom plate structure: a floor structure is applied between the modular lining 5 of two pilot holes 3, comprising the steps of:
s7.1, leveling a field between the two combined linings 5;
s7.2, constructing a bottom plate 10 in the finished site, and respectively constructing longitudinal beams 11 between the end parts of the bottom plate 10 and the combined linings 5 on the two sides;
the base plate 10 can be constructed by backfilling concrete or reinforced concrete.
And S7.3, filling a backfill material 12 into the lower part of the combined type lining 5, and constructing the backfill of the backfill material 12 according to the underground engineering function requirement so as to facilitate the subsequent paving of the auxiliary structure used by the tunnel.
S8, auxiliary structure construction: as shown in fig. 8, in the underground space where the floor structure has been completed, engineering construction of structures such as electromechanical equipment, water supply and drainage, and lighting equipment of an auxiliary structure such as an underground space building is performed.
The structure of this embodiment is the same as that of embodiment 1.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (7)
1. The underground engineering supporting structure is characterized by comprising two leading holes (3) which are obtained through underground excavation construction, wherein an arch structure (4) and a bottom plate structure are obtained through construction between the two leading holes (3); a combined lining (5) is arranged in the pilot tunnel (3), and the arch structure (4) and the bottom plate structure are connected with the combined lining (5); the arch structure (4) comprises a layer of arch shell primary support structure (6), the arch structure (4) forms advanced pre-support, supports (7) are arranged in the two combined linings (5), and the end parts of the arch shell primary support structure (6) are correspondingly connected with the two supports (7); a hinged support (13) is arranged between the arch shell primary support structure (6) and the support (7);
the lower part of the arch shell primary support structure (6) is provided with a secondary lining structure (8), and two ends of the secondary lining structure (8) are respectively and correspondingly connected with the two combined linings (5); the secondary lining structure (8) comprises an arch part (8-1) and a vertical part (8-2), wherein the arch part (8-1) is fixedly arranged right below the arched shell primary supporting structure, and the arch part (8-1) is connected with the arched shell primary supporting structure in a matching way; the vertical parts (8-2) are symmetrically arranged on two sides of the arch part (8-1), the vertical parts (8-2) are positioned in the combined lining, one end of each vertical part (8-2) is fixedly connected with the end part of the arch part (8-1), and the other end of each vertical part (8-2) is fixedly connected with the bottom of the combined lining.
2. Underground engineering supporting structure according to claim 1, characterized in that the floor structure comprises a floor (10), the bottoms of the two combined linings (5) are provided with longitudinal beams (11), and the floor (10) is arranged between the two longitudinal beams (11).
3. Underground engineering supporting structure according to claim 2, characterized in that the lower part of the modular lining (5) is provided with backfill material (12).
4. A construction method of an underground works supporting structure according to claim 1, comprising the steps of:
s1, respectively excavating an originating well (1) and a receiving well (2);
s2, excavating a pilot tunnel (3) between the originating well (1) and the receiving well (2) respectively, and paving a combined lining (5) in the pilot tunnel (3);
s3, shi Zuogong structure (4) forms advanced pre-support;
s4, excavating soil bodies (9) of surrounding areas at the lower parts of the arch structures (4) to form a central excavation area;
s5, repeatedly executing the step S3 and the step S4 until the excavation of the underground space corresponding to the whole underground engineering structure is completed;
s6, removing the combined lining (5) below the arch structure (4), and communicating the pilot tunnel (3) and the central excavation area;
s7, constructing a bottom plate structure between the combined lining (5) of the two pilot holes (3);
s8, constructing the auxiliary structure in the underground space of the completed bottom plate structure.
5. The construction method of an underground works supporting structure according to claim 4, wherein in step S3, the arch structure (4) includes a shell primary supporting structure (6) and a secondary lining structure (8), and the construction of the arch structure (4) includes the steps of:
s3.1, removing the combined lining (5) interfering with the arch shell primary supporting structure (6);
s3.2, shi Zuogong shell primary support structures (6), and manufacturing a support (7) between the arch shell primary support structures (6) and the combined lining (5) to form primary support structures of a transverse span space;
s3.3, excavating a top construction space under the protection of an arch shell primary supporting structure (6);
s3.4, detaching the combined lining (5) interfering with the secondary lining structure (8), and performing construction of the secondary lining structure (8) in the top construction space.
6. The construction method of an underground works supporting structure according to claim 5, wherein in step S3.2, a hinge support (13) is embedded in the support (7) and the hinge support (13) and the arch shell primary support structure (6) are connected when the support (7) is manufactured.
7. The construction method of an underground works supporting structure according to claim 4 or 5 or 6, wherein in step S7, the application of the floor structure includes the steps of:
s7.1, leveling a field between two combined linings (5);
s7.2, constructing a bottom plate (10) in the finished site, and respectively constructing longitudinal beams (11) between the end part of the bottom plate (10) and the combined lining (5);
s7.3, filling backfilling materials (12) in the lower part of the combined lining (5).
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| CN113417649B (en) * | 2021-08-09 | 2022-07-19 | 中铁第六勘察设计院集团有限公司 | Underground tunnel small-section to large-section expanding excavation method |
| CN115341900B (en) * | 2022-06-30 | 2023-03-10 | 国家能源投资集团有限责任公司 | Overlying rock loss reduction and settlement method based on artificial arch shell |
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| SU1114795A1 (en) * | 1980-09-11 | 1984-09-23 | Специальное конструкторско-технологическое бюро Главтоннельметростроя | Unit for constructing tunnel calotte trench |
| SU1087670A1 (en) * | 1982-04-26 | 1984-04-23 | Ленинградский государственный проектно-изыскательский институт "Ленметрогипротранс" | Method of constructing change station of single-vault structure for underground electric railways |
| RU2102602C1 (en) * | 1997-04-23 | 1998-01-20 | Открытое акционерное общество "Трансинжстрой" | Method for construction of deep subway station |
| JP2010090608A (en) * | 2008-10-08 | 2010-04-22 | Taisei Corp | Method for constructing underground space and structure of the underground space |
| CN102226403B (en) * | 2011-03-30 | 2013-11-13 | 中铁一局集团有限公司 | Construction method of large-span subway station main body by using arched cover method and station main body structure |
| CN102654055A (en) * | 2012-05-21 | 2012-09-05 | 乐贵平 | Construction method for compound construction of large-scale underground space structure by holes, groove and piles |
| CN203835410U (en) * | 2013-07-08 | 2014-09-17 | 北京城建设计发展集团股份有限公司 | Notch type hinge structure of fender post and bored tunnel vault and base plate structure |
| CN204253054U (en) * | 2014-11-28 | 2015-04-08 | 中铁第四勘察设计院集团有限公司 | Mountain tunnel stake arch cap excavation method comprehensive support structure |
| CN104653197B (en) * | 2014-12-15 | 2017-02-08 | 中铁第四勘察设计院集团有限公司 | Method for constructing extra-large variable cross section tunnel |
| CN104632235A (en) * | 2015-02-04 | 2015-05-20 | 北京市政建设集团有限责任公司 | Method for expanding excavation of large-diameter shield tunnel for subway station construction through pile arch wall support |
| CN109139049B (en) * | 2018-09-10 | 2020-05-08 | 中铁一局集团第二工程有限公司 | Construction method for secondary lining buckling arch of underground excavation station of subway |
| CN111305851B (en) * | 2020-04-15 | 2021-10-19 | 石家庄铁道大学 | Soft soil layer subway station extension method and structure based on inserted beam freezing method |
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2020
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