CN211900605U - Shield construction monitoring structure for down-penetrating urban dense building pipeline - Google Patents
Shield construction monitoring structure for down-penetrating urban dense building pipeline Download PDFInfo
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- CN211900605U CN211900605U CN201922435661.8U CN201922435661U CN211900605U CN 211900605 U CN211900605 U CN 211900605U CN 201922435661 U CN201922435661 U CN 201922435661U CN 211900605 U CN211900605 U CN 211900605U
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Abstract
The utility model discloses a wear shield structure construction monitoring structure of city dense building pipeline down is a device of shield structure wear pipeline and the monitoring structure of building under. The utility model discloses an improvement measure has realized stratum and pipeline settlement monitoring in making the interval construction of shield structure, has guaranteed the purpose of wearing under the safety.
Description
Technical Field
The utility model relates to a tunnel construction field especially relates to a wear shield of city dense building pipeline to construct construction monitoring structure down.
Background
In urban underground tunnel construction, particularly in tunnel construction for penetrating urban dense buildings, innovative construction structures of special construction sections are required, construction detection for penetrating the urban dense buildings under the existing tunnel shield is improved, and the purpose of safe construction can be achieved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a shield that wears city dense building pipeline down constructs construction monitoring structure is provided.
The utility model discloses the technical problem that solve is realized through following technical scheme:
a shield construction monitoring structure for a pipeline penetrating through an urban dense building comprises monitoring points arranged in a constructed object, and a backfill layer is arranged between the constructed object and a settlement monitoring point.
Preferably, the building object is a building wall, the settlement monitoring points are L-shaped deformed steel bars, and the backfill layer is an anchoring agent backfill wall layer.
Preferably, the constructed object is a well wall, an underground pipeline is arranged in the well wall, the settlement monitoring point is arranged on a support of the underground pipeline, and the support is a threaded steel bar hoop fixed on the underground pipeline; and a well cover is arranged above the well wall.
Preferably, the constructed object is a well wall, an underground pipeline is arranged in the well wall, the settlement monitoring point is arranged on a support above the underground pipeline, and the support is a twisted steel bar fixed at the bottom of the well; and a well cover is arranged above the well wall.
Preferably, the constructed object is a soil body, an underground pipeline is arranged in the soil body, the settlement monitoring points are deformed steel bars arranged in the ground surface openings, the backfill layer is arranged between the settlement monitoring points and the soil body, and the backfill layer is a concrete layer.
Preferably, the deformed steel bar phi 18 of the settlement monitoring point is deformed steel bar.
Preferably, the underground pipeline is a closed underground pipeline.
Preferably, the underground pipeline is an open underground pipeline.
Preferably, the underground pipeline is a non-manhole underground pipeline.
Preferably, the buried aperture of the settlement monitoring point above the underground pipeline without the service well is more than 150 mm.
Compared with the prior art, the utility model, following technological effect has:
the utility model relates to a wear shield structure construction monitoring structure's of city dense building pipeline improvement measure down, the effective settlement monitoring that has realized building and stratum pipeline in making the interval construction of shield, guaranteed to wear under the interval safety of shield.
Drawings
FIG. 1 is a schematic view of the structure of the building settlement and inclination monitoring point buried underground
FIG. 2 is the schematic view of the utility model of the structure embedded in the settlement monitoring point of the closed pipeline
FIG. 3 is the utility model discloses the structure sketch map is buried underground to development pipeline settlement monitoring point
FIG. 4 is the utility model discloses no inspection shaft pipeline settlement monitoring point buries the structure sketch map underground
In the figure, 1-build object, 2-settlement monitoring point, 3-backfill layer, 4-well cover, 5-support and 6-underground pipeline.
Detailed Description
The shield construction monitoring structure for passing through the urban dense building pipeline as shown in fig. 1, 2, 3 and 4 is constructed and implemented in the following engineering section.
The dragon lantern mountain is laid from east to west after leaving the open excavation region in the field entrance region, and then turned to the south to the Luxiao station; the exit field line section is laid from south to north after going out of the dragon lantern mountain vehicle section, passes through the west to form a self-filter road, is laid from east to west to the open cut section, turns to the north, crosses the left line normal line section upwards, and then continues to turn to the north to the temple station of Zhangjia. The shield construction method is adopted, and the tunnel in the shield interval mainly passes through sandy cobbles and sandstone layers.
Purpose of monitoring
The geological conditions and environment of the subway engineering passing region are very complex, and the construction difficulty is high. During construction, monitoring of important pipelines, structures and the like around a structural project and a construction line provides timely and reliable information for participating parties, so that the safety of the project during construction and the influence of construction on the surrounding environment are evaluated, and potential hazards or accidents which may endanger the safety of the construction and the surrounding environment are timely and accurately forecasted, so that effective measures are timely taken to eliminate the potential hazards, and the accidents are avoided.
Monitoring items and requirements
Deformation of building (structure): the building (structure) in the monitoring influence range is influenced and indicates to be located the distance range of about 1 ~ 2 times of tunnel buried depth, and the position is laid to the measurement station:
1) vertical displacement monitoring points are arranged along the outer wall of the building, and monitoring points are arranged at four corners and corners; when the building is located in a range of 1 time, 1 measuring point is arranged along every 10m or every 2 bearing columns of the outer wall, and 1 measuring point is arranged every 10 m-15 m or every 2-3 bearing columns of the rest of the outer wall;
2) the inclination monitoring points are preferably distributed on bearing columns or outer walls of buildings, and the maximum inclination perpendicular to an influence source (shield interval tunnel line) should be monitored in principle;
3) the crack monitoring points are distributed on the cracks at representative parts with larger stress or stress change or the like or the cracks with larger width.
Settling the pipeline: monitoring the pipelines in the influence range, and arranging measuring points:
1) arranging a measuring point every 5-10 m above the pipeline in a main influence area of the shield, wherein the distance between important pipeline measuring points is 5-10 m and the distance between general pipeline measuring points is 5-10 m according to the attribute of the pipeline;
2) shielding the pipeline in the secondary influence area; and (4) arranging a measuring point every 20-30 m along the pipeline direction according to the attribute of the pipeline.
Specifically, the method comprises the following steps:
1. building settlement, inclination and crack, as shown in fig. 1:
purpose of monitoring
In order to comprehensively know the influence condition of the construction on surrounding buildings, measuring points are arranged on a bearing structure of a corner of the building during the construction period, the sinking and the inclination of the building in the shield construction process are observed, and the safety of the building and the reliability of adopted engineering protection measures are judged according to the measuring points.
Measuring point layout principle and method
The building settlement observation base point and the ground surface vertical displacement monitoring net base point are shared, and the building settlement monitoring point is incorporated into the base point to form a closed circuit, an attached circuit and the like. The settlement monitoring points arranged on the building wall 1 adopt the following modes:
drilling:
a. drilling a hole with the diameter of 18mm and the depth of about 120mm at the selected position by using an electric drilling tool;
b. removing slag in the holes, and injecting a proper amount of clear water for curing;
c. injecting a proper amount of evenly stirred anchoring agent backfill layer 3 into the hole;
d. and (5) placing the marks of the monitoring points 2, backfilling gaps between the marks and the holes by using an anchoring agent, and maintaining for more than 15 days.
Observation, calculation methods and requirements
The settlement observation of the building adopts a geometric leveling method, and a precise level is used for observation, so that the technical requirements and observation cautions are consistent with the requirements of monitoring the surface settlement.
The calculation method comprises the following steps: A. height difference between two points B: elevation HB of undetermined point B for hab (differential elevation-forward reading) is: HB-HA-hAB
The crack of the building is observed by adopting a nail embedding method, nails are respectively nailed at two sides of a large crack of the building, and the change of the distance between the two nails at the two sides is measured by using a vernier caliper to judge the change length, the width and the position of the crack.
The building inclined settlement adopts a differential settlement method, the settlement difference of the building is measured, and the inclination direction are obtained through conversion.
a. Local inclination of building
The differential settlement (inclination) can be obtained by appropriate calculation based on the settlement observation result, and the settlement value deltaS of the point A, B can be obtained by leveling measurement when two structurally adjacent points A, B (the distance b can be measured) are knownA、ΔSBAfter that, the uneven settlement (inclination) calculation was performed.
The angle θ is the tilt angle produced by the desired product.
b. Inclination of the whole building
The inclination of the whole building is measured by measuring the deviation of the top observation point relative to the bottom observation point and calculating the inclination of the main body of the building according to the height of the building, i.e. the inclination of the main body of the building
The tilt measurement is mainly to determine the offset value Δ D of the building body.
Offset values Δ a and Δ B of the wall surfaces are calculated at X, Y, and then the total offset value Δ D of the building is calculated by a vector addition method, that is:
the inclination i can be calculated according to the total deviation value delta D and the height H of the building.
2. Pipeline settlement and differential settlement
The monitoring purpose is as follows:
the settlement and differential settlement conditions of the underground pipeline 6 during shield construction are used for judging the safety of the underground pipeline and the reliability of the adopted engineering protection measures.
Measuring point layout principle and method:
the underground pipeline settlement monitoring point is arranged on a pipeline influenced by construction, and the arrangement principle is as follows:
in principle, the monitoring points of the underground pipeline 6 are mainly distributed on a gas pipe, a water supply pipe, a sewage pipe, a large-scale rainwater pipe and a municipal pipeline square ditch, and the relative position relationship between the underground pipeline and the engineering is considered when the measuring points are distributed 6; the measuring points are preferably arranged at joints of pipelines or parts sensitive to displacement change;
the underground pipeline settlement monitoring points are buried in the following ways: different embodiments of the pipeline settlement measuring point burying form are shown in the figures 2, 3 and 4:
checking underground pipelines of a well: the well lid 4 is opened to directly arrange the measuring points on the pipeline or the hoop support 5 of the pipeline carrier;
secondly, 6 underground pipelines in the well wall 1 without the inspection well but with the excavation condition: excavating an exposed pipeline, and directly distributing measuring points on the pipeline;
pipeline without inspection well and excavation condition: the indirect monitoring points 2 can be buried in the corresponding ground surface, and a concrete layer 3 is used for backfilling;
when monitoring points are arranged on the pipeline, the hoop type embedded points can be adopted for the closed pipeline, and the monitoring point support 5 can be made on the pipeline or a pipeline buttress for the open pipeline.
Calculation, Observation methods and requirements
The underground pipeline settlement monitoring point adopts a geometric leveling method, and a forward route and a return route are measured by using a precision level gauge. The technical requirements and observation cautions are consistent with the requirements of the surface subsidence monitoring point. And after the result is qualified, calculating the height difference between each measuring point and the original point of the level. And counting and comparing the height difference values of each time to obtain the settlement value of each underground pipeline settlement monitoring point at the time.
Claims (10)
1. The utility model provides a wear shield structure construction monitoring structure of city dense building pipeline down which characterized by: the method comprises monitoring points (2) arranged in a constructed object (1), and a backfill layer (3) is arranged between the constructed object (1) and the settlement monitoring points (2).
2. The shield construction monitoring structure for the pipeline passing through the urban dense building according to claim 1, which is characterized in that: the building object (1) is a building wall, the settlement monitoring points (2) are L-shaped deformed steel bars, and the backfill layer is an anchoring agent backfill wall layer.
3. The shield construction monitoring structure for the pipeline passing through the urban dense building according to claim 1, which is characterized in that: the building object (1) is a well wall, an underground pipeline (6) is arranged in the well wall, the settlement monitoring point is arranged on a support (5) of the underground pipeline (6), and the support (5) is a threaded steel bar hoop fixed on the underground pipeline (6); and a well cover (4) is arranged above the well wall.
4. The shield construction monitoring structure for the pipeline passing through the urban dense building according to claim 1, which is characterized in that: the building object (1) is a well wall, an underground pipeline (6) is arranged in the well wall, the settlement monitoring point is arranged on a support (5) above the underground pipeline (6), and the support (5) is a twisted steel bar fixed at the bottom of the well; and a well cover (4) is arranged above the well wall.
5. The shield construction monitoring structure for the pipeline passing through the urban dense building according to claim 1, which is characterized in that: the construction object (1) is a soil body, an underground pipeline (6) is arranged in the soil body, the settlement monitoring points (2) are deformed steel bars arranged in ground surface openings, the backfill layer (3) is arranged between the settlement monitoring points and the soil body, and the backfill layer is a concrete layer.
6. The shield construction monitoring structure for the pipeline passing through the urban dense building under the ground according to claim 1 or 4, which is characterized in that: and the deformed steel bar phi 18 of the settlement monitoring point is deformed steel bar.
7. The shield construction monitoring structure for the pipeline passing through the urban dense building according to claim 3, which is characterized in that: the underground pipeline is a closed underground pipeline.
8. The shield construction monitoring structure for the pipeline passing through the urban dense building according to claim 4, which is characterized in that: the underground pipeline is an open underground pipeline.
9. The shield construction monitoring structure for the pipeline passing through the urban dense building according to claim 5, which is characterized in that: the underground pipeline is an underground pipeline without a service well.
10. The shield construction monitoring structure for the pipeline passing through the urban dense building according to claim 9, which is characterized in that: and the embedding aperture of a settlement monitoring point above the underground pipeline without the maintenance well is larger than 150 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922435661.8U CN211900605U (en) | 2019-12-30 | 2019-12-30 | Shield construction monitoring structure for down-penetrating urban dense building pipeline |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922435661.8U CN211900605U (en) | 2019-12-30 | 2019-12-30 | Shield construction monitoring structure for down-penetrating urban dense building pipeline |
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| CN211900605U true CN211900605U (en) | 2020-11-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112747715A (en) * | 2020-12-29 | 2021-05-04 | 淮安市中球盾构技术服务有限公司 | Pipeline deformation monitoring method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112747715A (en) * | 2020-12-29 | 2021-05-04 | 淮安市中球盾构技术服务有限公司 | Pipeline deformation monitoring method |
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