CN210033432U - Reinforcing structure for shield tunnel to penetrate existing building - Google Patents
Reinforcing structure for shield tunnel to penetrate existing building Download PDFInfo
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- CN210033432U CN210033432U CN201920234630.3U CN201920234630U CN210033432U CN 210033432 U CN210033432 U CN 210033432U CN 201920234630 U CN201920234630 U CN 201920234630U CN 210033432 U CN210033432 U CN 210033432U
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- existing building
- shield tunnel
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- reinforcing
- pipeline
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Abstract
The utility model relates to a tunnel construction technical field specifically indicates a reinforced structure of wearing existing building under shield tunnel. The shield tunnel construction system comprises vertical supporting structures positioned on the two transverse sides of an existing building and a transverse supporting structure positioned between the existing building and the shield tunnel; the vertical supporting structure is a pile foundation structure inserted into soil bodies on two transverse sides of the advancing route of the shield tunnel; the horizontal both ends of horizontal bearing structure fix and form the portal structure that supports existing building on the vertical supporting structure of both sides, be provided with the tension structure who carries out horizontal stretch-draw to horizontal bearing structure between the vertical supporting structure of both sides. The utility model discloses a reinforced structure is simple, has avoidd the pile foundation and the inner structure of existing building completely, has avoided causing destruction to existing building, has completely protected the integrality and the security of existing building, has very big spreading value.
Description
Technical Field
The utility model relates to a tunnel construction technical field specifically indicates a reinforced structure of wearing existing building under shield tunnel.
Background
With the increasing subway construction in China, the shield tunnel passes through the existing building and is difficult to avoid. When the existing building is penetrated under the shield tunnel, sleeve valve pipe grouting is conducted around the house in the traditional method, the geology below the existing building is restrained, and the bearing capacity of the whole geology is improved. However, due to the fact that the weight of the existing building is increased, uneven settlement of the existing building is too large due to poor geology below the existing building, and cracking of the wall of the existing building to be penetrated through is caused, so that the existing building becomes a dangerous house, and particularly, the existing building is very expensive in the north, the top, the wide and the deep house price in the first-line city.
Aiming at the problem, the Chinese invention patent with the patent number of CN107119732A named as a group beam active underpinning method of a shield tunnel underpass building provides a method for reinforcing the shield tunnel underpass building, the method comprises the steps of firstly carrying out earth excavation and reinforcing and waterproofing treatment on an indoor ground bottom, then constructing a pile foundation, and then manufacturing a main beam on the pile foundation; then embedding a secondary beam on a foundation upright column to be underpinned at the bottom of the building, wherein two ends of the secondary beam are respectively erected on a main beam through hydraulic jacks, and the building in the area affected by the subway tunnel is supported by the pile foundation, the main beam and the secondary beam; finally, monitoring the settlement condition of the upright columns in real time, and if the upright columns are settled, adjusting the settlement of the main beams and the house through a hydraulic jack; and if the stand column does not settle or does not settle any more, cutting the original stand column of the house below the secondary beam through the shield tunneling machine, and enabling the tunnel to pass through the lower part of the house. The method can well control the settlement of the whole building, but the indoor bottom of the building needs to be excavated, so that the damage to the whole building is large, the method is not beneficial to popularization and use, and particularly for ancient buildings, the indoor excavation method is difficult to implement.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that the reinforcing method for the shield tunnel of the prior art mentioned by the background art is large in damage to the existing building and difficult to popularize, and providing a reinforcing structure for the shield tunnel to pass the existing building.
The technical scheme of the utility model is that: the utility model provides a reinforced structure of existing building is worn under shield tunnel which characterized in that: the shield tunnel construction system comprises vertical supporting structures positioned on the two transverse sides of an existing building and a transverse supporting structure positioned between the existing building and the shield tunnel; the vertical supporting structure is a pile foundation structure inserted into soil bodies on two transverse sides of the advancing route of the shield tunnel; the horizontal both ends of horizontal bearing structure fix and form the portal structure that supports existing building on the vertical supporting structure of both sides, be provided with the tension structure who carries out horizontal stretch-draw to horizontal bearing structure between the vertical supporting structure of both sides.
The transverse supporting structure comprises a plurality of longitudinal pipelines arranged along the advancing direction of the shield tunnel and a plurality of transverse pipelines vertical to the advancing direction of the shield tunnel; the longitudinal pipeline and the transverse pipeline are grouting pipelines with a plurality of grouting through holes uniformly distributed on the pipe body, and the longitudinal pipeline and the transverse pipeline are arranged in a criss-cross mode and are connected together through grouting in the pipe to form a reinforced concrete structure for supporting an existing building.
If there is no supporting pile foundation under the existing building, the transverse supporting structure is only arranged with transverse pipes.
The tensioning structure comprises an anchor rope penetrating through the transverse pipeline; and two ends of the anchor cable are respectively and fixedly connected with the vertical supporting structures at two sides.
Further, the vertical supporting structure comprises a plurality of reinforcing piles which are inserted and driven on two sides of the existing building, and the plurality of reinforcing piles are arranged at intervals along the advancing direction of the shield tunnel.
The vertical supporting structure further comprises a connecting beam poured on a row of reinforcing piles on the same side of the existing building.
And two ends of the transverse steel pipe respectively extend into the connecting beam and are poured into the continuous beam.
And further, the pipe body extending from the transverse steel pipe into the continuous beam is of a closed pipeline structure with a pore-free surface.
The vertical supporting structure further comprises steel cofferdams at the two transverse sides of the existing building; the reinforcing piles are inserted into soil in the steel cofferdam.
The shield tunnel further comprises a plurality of sleeve valve pipes located between the vertical supporting structure and the existing building, and the sleeve valve pipes are arranged at intervals along the advancing direction of the shield tunnel.
And further, the longitudinal pipeline and the transverse pipeline are grouting pipelines which are arranged in gaps of pile foundation foundations below the existing building in a penetrating mode.
The utility model discloses at the horizontal both sides construction reinforcing pile of existing building, wear to establish violently in the soil body between existing building and shield tunnel, vertical pipeline, the pipeline is the slip casting pipe, the anchor rope is worn to horizontal pipeline, horizontal pipeline both ends are fixed on the even tie beam on reinforcing pile top, treat to carry out stretch-draw to the anchor rope after the concrete strength of even tie beam reaches tensile strength, then through carrying out the slip casting to the pipeline, the slurry gets into the soil body around the pipeline, slip casting parcel anchor rope forms the reinforced concrete structure who bears existing building, accomplish the reinforcement to existing building after the slip casting reaches design strength. The supporting force formed by the tensile force of the anchor cable is converted into the supporting force formed by the reverse friction force of the reinforced pile foundation through the reinforcing pile, so that the effect of supporting the existing building is achieved. Meanwhile, the pipeline is grouted after being tensioned, and the grouting body is injected into the soil body through the grouting holes to form a reinforcing layer, so that the effect of blocking the sand settlement above the reinforcing body is achieved.
The utility model has the advantages that: 1. the portal frame structure is arranged on the two transverse sides and the lower part of the existing building to support and fix the existing building, so that the problem that the existing building is damaged when being excavated is avoided;
2. the utility model discloses a set up tension structure on the vertical bearing structure of both sides, stretch-draw the horizontal bearing structure below the existing building, effectual sinking effort with the existing building is transmitted to the reinforcing pile foundation counter friction, avoided the risk that the sinking and the soil body change of existing building produced shield tunnel construction;
3. the utility model discloses a slip casting pipeline carries out the slip casting to existing building below soil body and consolidates, firstly forms the one deck back up coat, and separation back up body top sandy soil subsides, and the desiccation arouses sandy soil to subside when avoiding passing through the building because of the shield. Secondly, the rigidity of the soil body below can be enhanced to avoid the sinking problem, and thirdly, a stable supporting structure can be formed to support the existing building;
4. the utility model discloses a set up the steel cofferdam as the construction platform that the platform carries out reinforcing pile and tie beam, avoided because the existing building both sides subgrade sinks and the construction risk problem that the infiltration caused, guarantee constructor safety problem, improved the efficiency and the security of construction operation;
5. the utility model forms a waterproof (soil) curtain structure by grouting and reinforcing the sleeve valve pipe into the soil body between the vertical supporting structure and the existing building, thereby solving the problem of larger surface settlement possibly caused by a water-rich sand layer in the construction process;
6. the utility model discloses a reinforcement method application scope is extensive, is fit for the reinforcement of multiple structures, no matter how high, the many complicacies of stratum of structures, also no matter whether the building has the pile foundation, all can consolidate through this scheme and handle.
The utility model discloses a reinforced structure is simple, avoids indoor unable pile foundation construction of carrying on completely, has solved the rich water sand layer in house pile foundation below completely and has fallen the problem because of the shield construction desiccation subsides, has avoidd the pile foundation and the inner structure of existing building completely, has avoided causing destruction to existing building, has completely protected the integrality and the security of existing building, has very big spreading value.
Drawings
FIG. 1: the utility model discloses a front view of a reinforced structure;
FIG. 2: the utility model discloses a schematic plan view of a reinforcing structure;
wherein: 1-longitudinal pipeline; 2-a transverse duct; 3, reinforcing piles; 4-connecting the beam; 5, steel cofferdam; 6-existing building; 7-pile foundation.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments.
As shown in fig. 1-2, the existing building 6 is penetrated under the shield tunnel for reinforcement, if the soil layer under the existing building 6 is a water-rich sand layer, in order to avoid the problem of the subsurface layer caused by excessive precipitation in the construction process, waterproof curtains need to be constructed on the two transverse sides of the existing building 6 in advance, sleeve valve pipes are inserted into the soil around the 1-meter interval of the existing building 6, and then the soil is reinforced by grouting.
If the soil under the existing building 6 is not a water-rich soil layer, the construction of the waterproof curtain is not needed. The reinforcing structure is in fact a portal structure comprising vertical support structures located on both lateral sides of the existing building 6 and lateral support structures located in the soil body between the lower side of the existing building 6 and the upper side of the shield tunnel. As shown in fig. 1-2, in this embodiment, before constructing a vertical supporting structure, steel cofferdams 5 are constructed on two lateral sides of an existing building 6 in advance to serve as a construction platform, reinforcing piles 3 are inserted into the steel cofferdams 5, a plurality of reinforcing piles 3 are arranged at intervals along the advancing direction of a shield tunnel, and reinforcing steel bars of about 1m are reserved at the upper ends of the reinforcing piles 3 to prepare for a continuous beam 4 for subsequent construction.
As shown in fig. 2, the transverse supporting structure of the present embodiment includes a plurality of longitudinal pipes 1 arranged along the traveling direction of the shield tunnel and a plurality of transverse pipes 2 perpendicular to the traveling direction of the shield tunnel, the longitudinal pipes 1 and the transverse pipes 2 are grouting pipes having a plurality of grouting through holes uniformly distributed on the pipe body, and the longitudinal pipes 1 and the transverse pipes 2 are arranged in a criss-cross manner and hooked together by grouting into the pipes to form a reinforced concrete structure supporting the existing building 6. The longitudinal pipeline 1 and the transverse pipeline 2 are grouting pipelines which penetrate through gaps of a pile foundation 7 below an existing building 6.
Firstly, anchor cable holes are drilled by utilizing automatic guiding drilling equipment, then a longitudinal pipeline 1 with holes and a transverse pipeline 2 are penetrated, anchor cables are penetrated into the transverse pipeline 2, and the anchor cables are connected with a tensioning anchorage device in a steel cofferdam 5. After all the longitudinal pipelines 1 and the transverse pipelines 2 are constructed, firstly, the anchor cable is stretched and fixed by using a stretching anchorage device, then grouting is carried out in the transverse pipelines 2, grouting slurry permeates into soil below the existing building 6 through a grouting through hole, the soil is reinforced, the slurry flows into the soil to form a soil stopping curtain, and the settlement of the soil on the upper part of the anchor cable caused by the settlement of the lower part of the anchor cable is prevented.
A hollow block with the width of 3 meters is reserved on the inner side of the existing building 6 to be used as a connecting beam 4, the width of the connecting beam 4 depends on the tensile force of the anchor cable, the purpose is to resist the tensile force of the anchor cable and reduce the bending moment on the reinforcing pile 3, the connecting beam 4 is of a reinforced concrete structure, and the reinforcing steel bars inside the connecting beam and the reinforcing pile foundation are reserved with reinforcing steel bars with the height of 1 meter to be bound with each other. As shown in fig. 1, the tie beam 4 is cast on the upper end of a row of reinforcing piles 3 on the same side of an existing building 6.
In the embodiment, two ends of the anchor cable and the transverse steel pipe 2 are partially poured and fixed in the connecting beam 4, and in order to avoid hole blockage, the pipe body extending from the transverse steel pipe 2 to the connecting beam 4 is of a closed pipeline structure with a pore-free surface.
During actual construction: 1. constructing steel cofferdams 5 on two transverse sides of an existing building 6 to serve as construction platforms;
2. constructing a reinforcing pile 3 in the steel cofferdam 5, and reserving pile top reinforcing steel bars of the reinforcing pile 3;
3. drilling a soil body between the existing building 6 and the shield tunnel, penetrating a transverse pipeline 2 and a longitudinal pipeline 1 into the drilled hole, and penetrating an anchor cable into the transverse pipeline 2;
4. binding connecting beam 4 steel bars at the pile top of the reinforcing pile 3, binding and fixing the connecting beam 4 steel bars and the pile top steel bars together, pouring the connecting beam 4, and enabling the non-porous parts at the two ends of the transverse pipeline 2 to penetrate through the connecting beam 4;
5. and after the strength of the connecting beam 4 meets the requirement, tensioning the anchor cable, grouting into the transverse pipeline 2 and the longitudinal pipeline 1 after the design requirement is met, and finishing the construction of the reinforced structure after the grouting reaches the design strength.
As shown in fig. 2, the longitudinal direction of the present embodiment refers to a traveling direction of the shield tunnel, i.e., a left-right direction in fig. 2, and the lateral direction refers to a direction perpendicular to the traveling direction of the shield tunnel, i.e., an up-down direction in fig. 2.
The shield tunnel described in this embodiment passes through the existing building on the front side, and if the reinforcing structures are not convenient to arrange in the positions of the existing building on both sides of the shield tunnel, actually, the reinforcing structures can also be arranged on the shield tunnel, that is, the reinforcing piles are not inserted into the positions overlapping with the shield tunnel in a crossing manner, so as to avoid the passing positions of the shield tunnel, and in order to ensure the stability of the whole reinforcing structure, the inserting and punching ranges of other reinforcing piles can be properly extended, and the length of the connecting beam can be extended.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a reinforced structure of existing building is worn under shield tunnel which characterized in that: the shield tunnel construction system comprises vertical supporting structures positioned on the two transverse sides of an existing building (6) and a transverse supporting structure positioned between the existing building (6) and the shield tunnel; the vertical supporting structure is a pile foundation structure inserted into soil bodies on two transverse sides of the advancing route of the shield tunnel; the horizontal both ends of horizontal bearing structure fix and form the portal structure that supports existing building (6) on the vertical supporting structure of both sides, be provided with the tension structure who carries out horizontal stretch-draw to horizontal bearing structure between the vertical supporting structure of both sides.
2. The reinforcing structure of the shield tunnel passing through the existing building according to claim 1, wherein: the transverse supporting structure comprises a plurality of longitudinal pipelines (1) arranged along the advancing direction of the shield tunnel and a plurality of transverse pipelines (2) vertical to the advancing direction of the shield tunnel; the vertical pipeline (1) and the transverse pipeline (2) are grouting pipelines with a plurality of grouting through holes uniformly distributed on the pipe body, and the vertical pipeline (1) and the transverse pipeline (2) are arranged in a criss-cross mode and are hooked together through grouting into the pipe to form a reinforced concrete structure for supporting the existing building (6).
3. The reinforcing structure of the shield tunnel passing through the existing building according to claim 2, wherein: the tensioning structure comprises an anchor cable penetrating through the transverse pipeline (2); and two ends of the anchor cable are respectively and fixedly connected with the vertical supporting structures at two sides.
4. The reinforcing structure of the shield tunnel passing through the existing building according to claim 2, wherein: the vertical supporting structure comprises a plurality of reinforcing piles (3) which are inserted and driven on two sides of an existing building (6), and the plurality of reinforcing piles (3) are arranged at intervals along the advancing direction of the shield tunnel.
5. The reinforcing structure of the shield tunnel passing through the existing building according to claim 4, wherein: the vertical supporting structure comprises a connecting beam (4) poured on a row of reinforcing piles (3) on the same side of the existing building (6).
6. The reinforcing structure of the shield tunnel passing through the existing building according to claim 5, wherein: two ends of the transverse pipeline (2) respectively extend into the connecting beam (4) and are poured into the connecting beam (4).
7. The reinforcing structure of the shield tunnel passing through the existing building according to claim 6, wherein: the pipe body of the transverse pipeline (2) extending into the connecting beam (4) is of a closed pipeline structure with a pore-free surface.
8. The reinforcing structure of the shield tunnel passing through the existing building according to claim 4, wherein: the vertical supporting structure also comprises steel cofferdams (5) positioned at the two transverse sides of the existing building (6); the reinforcing piles (3) are inserted into soil in the steel cofferdam (5).
9. The reinforcing structure of the shield tunnel passing through the existing building according to claim 1, wherein: the shield tunnel is characterized by further comprising a plurality of sleeve valve pipes located between the vertical supporting structure and the existing building (6), and the sleeve valve pipes are arranged at intervals along the advancing direction of the shield tunnel.
10. The reinforcing structure of the shield tunnel passing through the existing building according to claim 2, wherein: the longitudinal pipeline (1) and the transverse pipeline (2) are grouting pipelines which penetrate through gaps of pile foundation foundations (7) below the existing building (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920234630.3U CN210033432U (en) | 2019-02-25 | 2019-02-25 | Reinforcing structure for shield tunnel to penetrate existing building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920234630.3U CN210033432U (en) | 2019-02-25 | 2019-02-25 | Reinforcing structure for shield tunnel to penetrate existing building |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210033432U true CN210033432U (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920234630.3U Expired - Fee Related CN210033432U (en) | 2019-02-25 | 2019-02-25 | Reinforcing structure for shield tunnel to penetrate existing building |
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| CN (1) | CN210033432U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2019
- 2019-02-25 CN CN201920234630.3U patent/CN210033432U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109779636B (en) * | 2019-02-25 | 2024-06-07 | 中交（广州）建设有限公司 | Reinforcing structure for shield tunnel to penetrate through existing building |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200207 |