CN112459790A - Pre-protection structure and pre-protection method for tunnel crossing section before crossing underground structure building - Google Patents
Pre-protection structure and pre-protection method for tunnel crossing section before crossing underground structure building Download PDFInfo
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- CN112459790A CN112459790A CN202011261535.6A CN202011261535A CN112459790A CN 112459790 A CN112459790 A CN 112459790A CN 202011261535 A CN202011261535 A CN 202011261535A CN 112459790 A CN112459790 A CN 112459790A
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 54
- 238000010276 construction Methods 0.000 claims abstract description 51
- 230000000149 penetrating effect Effects 0.000 claims abstract description 15
- 238000005192 partition Methods 0.000 claims description 33
- 230000000903 blocking effect Effects 0.000 claims description 26
- 239000002689 soil Substances 0.000 claims description 17
- 230000002787 reinforcement Effects 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000009435 building construction Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000004927 clay Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000013024 troubleshooting Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000000926 separation method Methods 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
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/04—Driving tunnels or galleries through loose materials; Apparatus therefor not otherwise provided for
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/02—Non-telescopic props
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D19/00—Provisional protective covers for working space
- E21D19/04—Provisional protective covers for working space for use in drifting galleries
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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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- Geochemistry & Mineralogy (AREA)
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- Mechanical Engineering (AREA)
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- Environmental & Geological Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
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Abstract
The invention relates to a pre-protection structure and a pre-protection method for a tunnel crossing section before crossing an underground structure building, wherein the pre-protection structure comprises the following components: a plurality of supporting piles arranged along two sides of the underground structure building and two sides of the crossing section; a plurality of reinforcing piles are densely arranged along two sides of the underground structure building and between the adjacent supporting piles, and each reinforcing pile comprises a plurality of upper reinforcing piles positioned between the elevation of the top of the penetrating section and the elevation of the bottom of the underground structure building and a plurality of lower reinforcing piles positioned below the elevation of the bottom of the penetrating section; a plurality of first isolating piles densely arranged along the cross section of the crossing section and a plurality of second isolating piles densely arranged along two sides of the crossing section and between the first isolating piles and the adjacent supporting piles. The pre-protection structure of the invention enhances the structural strength of the underground structure building, ensures the stability of the underground structure building in the construction process and reduces the construction risk.
Description
Technical Field
The invention relates to the field of underground tunnel construction, in particular to a pre-protection structure and a pre-protection method for a tunnel crossing section before crossing an underground structure building.
Background
By the end of 2019, 39 cities have opened rail transit in China, the line operating mileage exceeds 6600 kilometers, the shield method and the pipe jacking method become rail transit construction, and municipal construction projects such as: one of the main and common construction methods for projects such as urban river-crossing tunnels and lower overpass highway engineering. With the increase of the utilization rate of underground space, the construction stages of the shield method and the pipe jacking method can pass through the underground space in different forms such as downward passing, side passing or overlapping mode: existing underground structures such as important municipal pipelines, formed rail transit facilities, municipal pedestrian passageways and the like; meanwhile, with the shortage of underground space and the special environmental factors such as the construction of underground space in old urban areas, the construction equipment of the shield method and the pipe jacking method tends to diversify from the diameter and the shape specification (circular, double-circle and rectangle-like) so as to meet the construction requirements in special construction environments, and the settlement control requirements on earth surfaces and underground structures are higher and higher.
Disclosure of Invention
In order to solve the problems, the tunnel crossing section is pre-reinforced and protected before the construction of the tunnel crossing underground structure building, so that the stability of the underground structure building during the subsequent tunnel crossing construction is enhanced, and the risk during the tunnel crossing construction is reduced.
The invention is realized by the following technical scheme: a pre-protection structure for a tunnel traversing section before traversing an underground structure building, comprising:
a plurality of supporting piles are distributed along two sides of the underground structure building, the supporting piles are positioned on two sides of the crossing section, and the bottom ends of the supporting piles extend into the position below the bottom elevation of the crossing section;
a plurality of reinforcing piles are densely arranged along two sides of the underground structure and between the adjacent supporting piles, wherein the plurality of reinforcing piles comprise a plurality of upper reinforcing piles positioned between the top elevation of the penetrating section and the bottom elevation of the underground structure and a plurality of lower reinforcing piles positioned below the bottom elevation of the penetrating section;
the supporting pile comprises a plurality of first partition piles densely arranged along the cross section of the crossing section and a plurality of second partition piles densely arranged along two sides of the crossing section and between the first partition piles and the adjacent supporting piles.
According to the invention, through the arrangement of the supporting piles, the upper reinforcing piles and the lower reinforcing piles, frame type reinforcement is formed around the lower crossing section of the underground structure building, so that the strength of a soil body structure around the crossing section is enhanced, the stability of the underground structure building is ensured in the process of tunnel crossing construction, and the construction risk in tunnel crossing construction can be effectively controlled. In addition, the penetrating section close to the underground structure building is divided into a closed compartment structure by matching the first blocking pile and the second blocking pile which are arranged in the frame type reinforcement mode, and for poor soil bodies, the soil body loss range is reduced through the compartment structure.
The invention further improves the tunnel crossing section pre-protection structure before crossing the underground structure building: the supporting piles, the upper reinforcing piles and the lower reinforcing piles are all formed by adopting MJS process construction.
The invention further improves the tunnel crossing section pre-protection structure before crossing the underground structure building: the bottom end of the support pile extends to the position below the liquefied soil layer.
The invention further improves the tunnel crossing section pre-protection structure before crossing the underground structure building:
the underground structure building is provided with a socket type branch pipe extending outwards;
the protection architecture in advance still including closely locating many bearings of the certain region in branch pipe below separate disconnected stake, certain region be by the branch pipe is peripheral the support stake go up the reinforcement stake first separate disconnected stake with the second separates the region that disconnected stake encloses, the bearing cuts off the stake and is located the bottom elevation of branch pipe with pass through between the top elevation of section.
The invention further improves the tunnel crossing section pre-protection structure before crossing the underground structure building: the top end and the bottom end of the first blocking pile and the top end and the bottom end of the second blocking pile are respectively flush with the top end and the bottom end of the supporting pile.
The invention further improves the tunnel crossing section pre-protection structure before crossing the underground structure building:
a settlement joint is arranged at the position, corresponding to the crossing section, on the underground structure building;
the pre-protection structure also comprises an enclosure structure which is arranged around the periphery of the settlement joint and extends upwards to the ground;
the enclosure structure comprises two first enclosure devices arranged on two sides of the settlement joint oppositely and two second enclosure devices arranged at openings at two ends of the settlement joint oppositely in an enclosing manner
The invention also provides a pre-protection method for the tunnel crossing section before crossing the underground structure building, which comprises the following steps:
before construction of a tunnel crossing underground structure building, arranging a plurality of supporting piles along two sides of the underground structure building, enabling the supporting piles to be located on two sides of the crossing section, and enabling the bottom ends of the supporting columns to stretch into the position below the bottom elevation of the crossing section;
a plurality of upper reinforcing piles are densely arranged on two sides of the underground structure and between the adjacent supporting piles, the top ends of the upper reinforcing piles are lower than the bottom elevation of the underground structure, and the bottom ends of the upper reinforcing piles are higher than the top elevation of the penetrating sections;
a plurality of lower reinforcing piles are densely arranged on two sides of the underground structure building and between the adjacent supporting piles, and the top ends of the lower reinforcing piles are lower than the bottom elevation of the penetrating sections;
a plurality of first partition piles are arranged along the cross section of the crossing section in an intensive mode, and a plurality of second partition piles are arranged along two sides of the crossing section and between the first partition piles and the adjacent supporting piles in an intensive mode;
and when the tunnel passes through the underground structure building for construction, the first partition piles are ground.
The invention further improves the pre-protection method for the tunnel crossing section before crossing the underground structure building, and comprises the following steps: the supporting piles, the upper reinforcing piles and the lower reinforcing piles are all formed by adopting MJS process construction.
The invention further improves the pre-protection method for the tunnel crossing section before crossing the underground structure building, and comprises the following steps:
the underground structure building is provided with a socket type branch pipe extending outwards;
first separate the disconnected stake with just going on after the second cuts off the stake setting the tunnel passes through before the underground structure building construction, in many bearings of close establishment separate the disconnected stake in certain area of branch pipe below, and make the bearing separate the disconnected stake and be located the bottom elevation of branch pipe with pass through between the top elevation of section, certain area be by the branch pipe is peripheral the support stake go up the reinforcement stake first separate the disconnected stake with the second separates the region that the disconnected stake encloses.
The invention further improves the pre-protection method for the tunnel crossing section before crossing the underground structure building, and comprises the following steps:
a settlement joint is arranged at the position, corresponding to the crossing section, on the underground structure building;
before the construction of the tunnel penetrating through the underground structure building, constructing an enclosure structure at the periphery of the settlement joint, and extending the enclosure structure upwards to the ground, wherein,
when the enclosure structure is constructed, two first enclosure devices are oppositely arranged on two sides of the settlement joint, and two second enclosure devices are oppositely arranged at openings at two ends of the settlement joint.
Drawings
Fig. 1 is a floor plan view of a tunnel-traversing section pre-protection structure before traversing an underground structure building according to the present invention.
Fig. 2 is a schematic sectional view taken along line a-a of fig. 1.
Fig. 3 is a schematic sectional view taken along line B-B of fig. 1.
Fig. 4 is a schematic cross-sectional view of C-C of fig. 1.
Detailed Description
For rail transit construction, the existing underground structure building generally needs to be penetrated, but the structure of the underground structure building is complicated along with the increase of the utilization rate of underground space, and for the construction of a common shield method and a common pipe jacking method, the construction requirement under a special construction environment is met, and meanwhile, the settlement control requirement of the earth surface and the underground structure building is met.
According to the invention, the tunnel crossing section is pre-reinforced and protected before the construction of the tunnel crossing underground structure building, so that the structural strength of the underground structure building is enhanced, the stability of the underground structure building during the subsequent tunnel crossing construction is ensured, and the risk during the tunnel crossing construction is reduced.
The pre-protection structure and the pre-protection method for the tunnel crossing section before crossing the underground structure building are further described with reference to the attached drawings.
Referring to fig. 1 and 2, fig. 1 is a plan view of a pre-protection structure for a tunnel-traversing section before traversing an underground structure building according to the present invention, and fig. 2 is a schematic sectional view a-a of fig. 1.
A pre-protection structure for a tunnel traversing section before traversing an underground structure building, comprising:
a plurality of supporting piles 10 arranged along two sides of the underground structure building 60, wherein the supporting piles 10 are positioned at two sides of the crossing section, and the bottom ends of the supporting piles 10 extend into the height level below the bottom of the crossing section;
a plurality of reinforcing piles densely arranged along both sides of the underground structure 60 between the adjacent supporting piles 10, the plurality of reinforcing piles including a plurality of upper reinforcing piles 21 positioned between the top elevation of the crossing section and the bottom elevation of the underground structure 60 and a plurality of lower reinforcing piles 22 positioned below the bottom elevation of the crossing section;
a plurality of first partition piles 31 densely arranged along the cross section of the crossing section, and a plurality of second partition piles 32 densely arranged along both sides of the crossing section and between the first partition piles 31 and the adjacent support piles 10.
Specifically, the underground structure 60 is a box culvert structure with high crossing difficulty and high disturbance prevention requirement, and the box culvert structure is buried to a position about 4 meters below the ground 80 elevation, and in this embodiment, includes two crossing sections, i.e., an east line 71 and a west line 72 in fig. 1 and fig. 2, which need to be crossed from below the box culvert structure.
Because the MJS process can effectively control the pile diameter, pressure and length, and can effectively avoid the influence on complex underground structures, in this embodiment, the MJS process is adopted to perform vertical pipe-inserting grouting on the ground to construct the support pile 10, the upper reinforcing pile 21, the lower reinforcing pile 22 and the like, the top end of the support pile 10 is controlled to be higher than the bottom elevation of the underground structure 60, and the bottom end of the support pile 10 is controlled to be lower than the bottom elevation of the penetrating section and penetrate through the liquefied stratum to a certain depth. Specifically, the soil around the underground structure building sequentially comprises a backfill soil layer 81, a sandy silt layer 82 and a silty clay layer 83 from the ground 80 to the bottom, wherein the sandy silt layer 82 is the weak-strength liquefied ground layer, and the support pile 10 penetrates the sandy silt layer 82 from the underground structure building 60 to a certain depth from the silty clay layer 83, so that the support pile 10 has sufficient support strength.
Through the arrangement of the supporting piles 10, the upper reinforcing piles 21 and the lower reinforcing piles 22, frame type reinforcement is formed around the lower crossing section of the underground structure building 60, so that the characteristic that soil can be liquefied is reduced and reduced, the phenomenon that equipment gushes during construction and soil loss is caused is avoided, meanwhile, the strength of the soil structure around the tunneling crossing section is enhanced, the stability of the underground structure building is ensured in the process of tunnel crossing construction, and the construction risk during tunnel crossing construction can be effectively controlled.
In addition, with reference to fig. 3 and 4, fig. 3 is a schematic sectional view taken along line B-B of fig. 1, and fig. 4 is a schematic sectional view taken along line C-C of fig. 1. In this embodiment, the top ends and the bottom ends of the first blocking pile 31 and the second blocking pile 32 are respectively flush with the top end and the bottom end of the supporting pile 10, so that the first blocking pile 31 and the second blocking pile 32 cooperate with the frame reinforcement to divide the passing section close to the underground structure building into a closed compartment structure. It should be noted that the first blocking pile 31 and the second blocking pile 32 can be constructed by combining the MJS process and the cement mixing pile process, which not only can meet the requirement of precise control during construction, but also can conveniently grind the first blocking pile 31 at the cross section of the crossing section during crossing so as to avoid shielding the crossing equipment.
As a preferred embodiment, refer to fig. 3:
the underground structure building 60 is provided with a spigot-and-socket branch pipe 62 extending outwards;
this protect structure in advance still includes closely locate many bearings of this branch pipe 62 below certain region and separate stake 40, this certain region be by this support stake 10 of this branch pipe 62 periphery, should go up the reinforced pile 21, this first separate stake 31 and this second separate the region that stake 32 encloses, should bear separate stake 40 and be located this branch pipe 62 bottom elevation and should pass through between the top elevation of section.
Specifically, the supporting partition pile 40 is constructed by adopting an MJS process, the periphery of the supporting partition pile 40 is connected with the corresponding first partition pile 31, second partition pile 32, support pile 10 and upper reinforcing pile 21 to form a partition plate shape, the strength of the soil body in the area is enhanced, and the supporting force of the periphery can be used, so that the supporting and the partition of the branch pipe 62 and the interface area of the branch pipe are realized, and the influence of the upheaval and the heaving caused by the crossing of the crossing equipment on the upper part is reduced.
As a preferred embodiment, reference is made to fig. 1 and 2:
a settlement joint 61 is arranged at the position corresponding to the crossing section on the underground structure building 60;
the pre-protection structure also comprises a building enclosure 50 which is arranged around the periphery of the settlement joint 61 and extends upwards to the ground;
the enclosure structure 50 includes two first enclosures 51 oppositely disposed at two sides of the settlement joint 61 and two second enclosures 52 oppositely disposed at two openings at two ends of the settlement joint 61.
Specifically, the first enclosure device 51 is a larsen steel sheet pile, the second enclosure device 52 is a C-shaped row pile, the C-shaped row pile is constructed by an SMW construction method, pile bodies at two ends of the C-shaped row pile are respectively connected with the two larsen steel sheet piles, in addition, the first enclosure device 51 is arranged at the upper part of the underground structure building 60, the second enclosure device 52 is arranged at two sides of the underground structure building 60, the bottom end of the second enclosure device 52 extends downwards out of the underground structure building 60, and preferably, the bottom end of the second enclosure device 52 is flush with the bottom end of the upper reinforcing pile 21. Through the arrangement of the enclosure structure 50, the leakage stoppage of the excavation of a settlement joint area is facilitated under the emergency condition, so that the pre-protection structure can meet the settlement control requirement on the underground structure building 60 and is convenient for troubleshooting.
The invention also provides a pre-protection method before penetrating through an underground structure building, which is shown in the figures 1 to 4.
The underground structure building 60 is a box culvert structure with high crossing difficulty and high disturbance prevention requirement, the box culvert structure is buried to a position about 4 meters below the ground 80 elevation, and the crossing sections needing to be crossed from the lower part of the box culvert structure are 2, namely an east line 71 and a west line 72 in fig. 1 and 2. The pre-protection method comprises the following steps:
step 1, before the construction of tunnel crossing underground structure building 60, laying a plurality of supporting piles 10 along two sides of the underground structure building 60, positioning the supporting piles 10 at two sides of the crossing section, and extending the bottom ends of the supporting piles 10 to be below the bottom elevation of the crossing section.
Specifically, the MJS process can effectively control the pile diameter, pressure and length, and can effectively avoid the influence on the complex underground structure, so in this embodiment, the MJS process is adopted to perform vertical pipe-inserting grouting construction on the ground to construct the support pile 10, control the top end of the support pile 10 to be higher than the bottom elevation of the underground structure 60, and control the bottom end of the support pile 10 to be lower than the bottom elevation of the crossing section and penetrate through the liquefied stratum to a certain depth. Specifically, the soil around the underground structure building sequentially comprises a backfill soil layer 81, a sandy silt layer 82 and a silty clay layer 83 from the ground 80 to the bottom, wherein the sandy silt layer 82 is the weak-strength liquefied ground layer, and the support pile 10 penetrates the sandy silt layer 82 from the underground structure building 60 to a certain depth from the silty clay layer 83, so that the support pile 10 has sufficient support strength.
Step 2, densely arranging a plurality of upper reinforcing piles 21 on two sides of the underground structure 60 and between adjacent supporting piles 10, and enabling the top ends of the upper reinforcing piles 21 to be lower than the bottom elevation of the underground structure 60 and the bottom ends of the upper reinforcing piles 21 to be higher than the top elevation of the crossing section;
a plurality of lower reinforcing piles 22 are closely arranged at both sides of the underground structure 60 between the adjacent supporting piles 10, and the top ends of the lower reinforcing piles 22 are lower than the bottom elevation of the passing section.
Specifically, the upper reinforcing pile 21 and the lower reinforcing pile 22 are constructed by adopting an MJS process through vertical pipe insertion grouting on the ground, the upper reinforcing pile 21 and the lower reinforcing pile 22 are vertically in one-to-one correspondence and are transversely connected with adjacent supporting piles 10, and then frame type reinforcement is formed around a lower crossing section of the underground structure building 60, so that the characteristic that a soil body can be liquefied is reduced and reduced, the phenomenon that the soil body is lost due to gushing of equipment in construction is avoided, meanwhile, the strength of the soil body structure around the crossing section is enhanced, the stability of the underground structure building is ensured in the tunnel crossing construction process, and the construction risk in tunnel crossing construction can be effectively controlled.
Step 3, a plurality of first partition piles 31 are arranged along the cross section of the crossing section in an interval mode, and a plurality of second partition piles 32 are arranged along two sides of the crossing section and between the first partition piles 31 and the adjacent supporting piles 10 in an interval mode;
specifically, in this embodiment, the top ends and the bottom ends of the first blocking pile 31 and the second blocking pile 32 are flush with the top end and the bottom end of the supporting pile 10, respectively, so that the first blocking pile 31 and the second blocking pile 32 cooperate with the frame reinforcement to divide the passing section close to the underground structure into the enclosed compartment structure.
And 4, polishing off the first partition pile 31 when the tunnel passes through the underground structure building.
Specifically, the first blocking pile 31 and the second blocking pile 32 can be constructed by combining the MJS process and the cement mixing pile process, so that not only can the accurate control during construction be met, but also the first blocking pile 31 at the section of the crossing section can be conveniently ground during crossing so as to avoid shielding of crossing equipment.
As a preferred embodiment:
the underground structure building 60 is provided with a spigot-and-socket branch pipe 62 extending outwards;
after the first blocking pile 31 and the second blocking pile 32 are arranged and before the tunnel passes through the underground structure building construction, a plurality of supporting blocking piles 40 are densely arranged in a certain area below the branch pipe 62, the supporting blocking piles 40 are located between the bottom elevation of the branch pipe 62 and the top elevation of the passing section, and the certain area is an area surrounded by the supporting pile 10, the upper reinforcing pile 21, the first blocking pile 31 and the second blocking pile 32 around the branch pipe 62.
Specifically, the supporting partition pile 40 is constructed by adopting an MJS process, the periphery of the supporting partition pile 40 is connected with the corresponding first partition pile 31, second partition pile 32, support pile 10 and upper reinforcing pile 21 to form a partition plate shape, the strength of the soil body in the area is enhanced, and the supporting force of the periphery can be used, so that the supporting and the partition of the branch pipe 62 and the interface area of the branch pipe are realized, and the influence of the upheaval and the heaving caused by the crossing of the crossing equipment on the upper part is reduced.
As a preferred embodiment:
a settlement joint 61 is arranged at the position corresponding to the crossing section on the underground structure building 60;
before the construction of the tunnel passing through the underground structure building, the building enclosure 50 is constructed around the settlement joint 61, so that the building enclosure 50 extends upwards to the ground, wherein,
when the enclosure structure 50 is constructed, two first enclosure devices 51 are oppositely arranged on two sides of the settlement joint 61, and two second enclosure devices 52 are oppositely arranged at openings at two ends of the settlement joint 61.
Specifically, the first enclosure device 51 is a larsen steel sheet pile, the second enclosure device 52 is a C-shaped row pile, the C-shaped row pile is constructed by an SMW construction method, pile bodies at two ends of the C-shaped row pile are respectively connected with the two larsen steel sheet piles, in addition, the first enclosure device 51 is arranged at the upper part of the underground structure building 60, the second enclosure device 52 is arranged at two sides of the underground structure building 60, the bottom end of the second enclosure device 52 extends downwards out of the underground structure building 60, and preferably, the bottom end of the second enclosure device 52 is flush with the bottom end of the upper reinforcing pile 21. Through the arrangement of the enclosure structure 50, the leakage stoppage of the excavation of a settlement joint area is facilitated under the emergency condition, so that the pre-protection structure can meet the settlement control requirement on the underground structure building 60 and is convenient for troubleshooting.
The comprehensive measures are adopted to form local support, frame type reinforcement, warehouse separation, branch pipe support and settlement joint pre-emergency enclosure on the underground structure building structure, and three-dimensional protection, emergency treatment acceleration and the like are realized in the construction process. In addition, after the mode of actively intervening the pre-protection measures is adopted, the settlement control effect is superior to that of the settlement effect controlled only by the construction parameters in the prior art.
While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.
Claims (10)
1. A tunnel-traversing section pre-protection structure for traversing underground structures, comprising:
a plurality of supporting piles are distributed along two sides of the underground structure building, the supporting piles are positioned on two sides of the crossing section, and the bottom ends of the supporting piles extend into the position below the bottom elevation of the crossing section;
a plurality of reinforcing piles are densely arranged along two sides of the underground structure and between the adjacent supporting piles, wherein the plurality of reinforcing piles comprise a plurality of upper reinforcing piles positioned between the top elevation of the penetrating section and the bottom elevation of the underground structure and a plurality of lower reinforcing piles positioned below the bottom elevation of the penetrating section;
the supporting pile comprises a plurality of first partition piles densely arranged along the cross section of the crossing section and a plurality of second partition piles densely arranged along two sides of the crossing section and between the first partition piles and the adjacent supporting piles.
2. The pre-protection structure for a tunnel traversing section before traversing an underground structure building according to claim 1, wherein: the supporting piles, the upper reinforcing piles and the lower reinforcing piles are all formed by adopting MJS process construction.
3. The pre-protection structure for a tunnel traversing section before traversing an underground structure building according to claim 1, wherein: the bottom end of the support pile extends to the position below the liquefied soil layer.
4. The pre-protection structure for a tunnel traversing section before traversing an underground structure building according to claim 1, wherein:
the underground structure building is provided with a socket type branch pipe extending outwards;
the protection architecture in advance still including closely locating many bearings of the certain region in branch pipe below separate disconnected stake, certain region be by the branch pipe is peripheral the support stake go up the reinforcement stake first separate disconnected stake with the second separates the region that disconnected stake encloses, the bearing cuts off the stake and is located the bottom elevation of branch pipe with pass through between the top elevation of section.
5. The pre-protection structure for a tunnel traversing section before traversing an underground structure according to claim 4, wherein: the top end and the bottom end of the first blocking pile and the top end and the bottom end of the second blocking pile are respectively flush with the top end and the bottom end of the supporting pile.
6. The pre-protection structure for tunnel crossing sections before crossing an underground structure building according to any one of claims 1 to 5, wherein:
a settlement joint is arranged at the position, corresponding to the crossing section, on the underground structure building;
the pre-protection structure also comprises an enclosure structure which is arranged around the periphery of the settlement joint and extends upwards to the ground;
the enclosure structure comprises two first enclosure devices arranged on two sides of the settlement joint in an opposite mode and two second enclosure devices arranged at openings at two ends of the settlement joint in an opposite surrounding mode.
7. A pre-protection method for a tunnel crossing section before crossing an underground structure building is characterized by comprising the following steps:
before construction of a tunnel crossing underground structure building, arranging a plurality of supporting piles along two sides of the underground structure building, enabling the supporting piles to be located on two sides of the crossing section, and enabling the bottom ends of the supporting columns to stretch into the position below the bottom elevation of the crossing section;
a plurality of upper reinforcing piles are densely arranged on two sides of the underground structure and between the adjacent supporting piles, the top ends of the upper reinforcing piles are lower than the bottom elevation of the underground structure, and the bottom ends of the upper reinforcing piles are higher than the top elevation of the penetrating sections;
a plurality of lower reinforcing piles are densely arranged on two sides of the underground structure building and between the adjacent supporting piles, and the top ends of the lower reinforcing piles are lower than the bottom elevation of the penetrating sections;
a plurality of first partition piles are arranged along the cross section of the crossing section in an intensive mode, and a plurality of second partition piles are arranged along two sides of the crossing section and between the first partition piles and the adjacent supporting piles in an intensive mode;
and when the tunnel passes through the underground structure building for construction, the first partition piles are ground.
8. The pre-protection method for tunnel traversing section before traversing underground structure building according to claim 7, wherein: the supporting piles, the upper reinforcing piles and the lower reinforcing piles are all formed by adopting MJS process construction.
9. The pre-protection method for tunnel traversing section before traversing underground structure building according to claim 7, wherein:
the underground structure building is provided with a socket type branch pipe extending outwards;
first separate the disconnected stake with just going on after the second cuts off the stake setting the tunnel passes through before the underground structure building construction, in many bearings of close establishment separate the disconnected stake in certain area of branch pipe below, and make the bearing separate the disconnected stake and be located the bottom elevation of branch pipe with pass through between the top elevation of section, certain area be by the branch pipe is peripheral the support stake go up the reinforcement stake first separate the disconnected stake with the second separates the region that the disconnected stake encloses.
10. The pre-protection method for the tunnel crossing section before crossing the underground structure building according to any one of claims 7 to 9, wherein:
a settlement joint is arranged at the position, corresponding to the crossing section, on the underground structure building;
before the construction of the tunnel penetrating through the underground structure building, constructing an enclosure structure at the periphery of the settlement joint, and extending the enclosure structure upwards to the ground, wherein,
when the enclosure structure is constructed, two first enclosure devices are oppositely arranged on two sides of the settlement joint, and two second enclosure devices are oppositely arranged at openings at two ends of the settlement joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011261535.6A CN112459790B (en) | 2020-11-12 | 2020-11-12 | Pre-protection structure and pre-protection method for tunnel crossing section before crossing underground structure building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011261535.6A CN112459790B (en) | 2020-11-12 | 2020-11-12 | Pre-protection structure and pre-protection method for tunnel crossing section before crossing underground structure building |
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| CN108979659A (en) * | 2018-07-04 | 2018-12-11 | 中铁第勘察设计院集团有限公司 | The ruggedized construction and method of structures are worn under weak soil rich water large cross-section tunnel group |
| CN109779636A (en) * | 2019-02-25 | 2019-05-21 | 中交（广州）建设有限公司 | The ruggedized construction of existing building is worn under a kind of shield tunnel |
| CN210509175U (en) * | 2019-08-13 | 2020-05-12 | 中铁十一局集团城市轨道工程有限公司 | Reinforced structure of building is worn to shield closely side |
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| CN101899977A (en) * | 2010-02-04 | 2010-12-01 | 上海隧道工程股份有限公司 | Ultra-shallow earth-covered subway shield traversing operation tunnel construction method of |
| CN102996136A (en) * | 2012-11-21 | 2013-03-27 | 宏润建设集团股份有限公司 | Deformation control method for close-range downward penetration of shield through composite-foundation building |
| CN103696784A (en) * | 2014-01-03 | 2014-04-02 | 沈阳铁道勘察设计院有限公司 | Large-diameter long pipe curtain construction method for shallowly-buried large-span under-tunnel-passing architectural structure |
| CN206129278U (en) * | 2016-10-26 | 2017-04-26 | 中铁十一局集团城市轨道工程有限公司 | Earth pressure balance shield machine closely inclines and just props up undercut tunnel's construction structures |
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| CN109779636A (en) * | 2019-02-25 | 2019-05-21 | 中交（广州）建设有限公司 | The ruggedized construction of existing building is worn under a kind of shield tunnel |
| CN210509175U (en) * | 2019-08-13 | 2020-05-12 | 中铁十一局集团城市轨道工程有限公司 | Reinforced structure of building is worn to shield closely side |
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| CN112459790B (en) | 2023-05-16 |
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