CN103485790A - Shallow tunneling method for pipe-proof-supporting structure combined system - Google Patents
Shallow tunneling method for pipe-proof-supporting structure combined system Download PDFInfo
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- CN103485790A CN103485790A CN201310472458.2A CN201310472458A CN103485790A CN 103485790 A CN103485790 A CN 103485790A CN 201310472458 A CN201310472458 A CN 201310472458A CN 103485790 A CN103485790 A CN 103485790A
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Abstract
The invention discloses a shallow tunneling method for a pipe-proof-supporting structure combined system. The method comprises the steps of A, arranging two vertical working wells in areas without sensitive buildings at the two ends of an underground structure; B, ejecting size and diameter combination steel pipes into the periphery of an underground main body structure through the vertical working wells to form a tube screen; C, reinforcing a soil body between the steel pipes through a grouting or freezing method to form water tightness underground space; D, under the protection of the combined tube screen, conducting shallow tunneling construction on the underground main body structure, and enabling the tube screen and a supporting structure to form a longitudinal annular combination stress system with large rigidity; E, after the combination stress system achieves a certain strength, disassembling an inner contemporary support, and constructing the underground main body structure. The shallow tunneling method for the pipe-proof-supporting structure combined system has the advantages that the pipe screen is combined with the supporting structure, the combined stress system with the large rigidity is formed, settlement is strictly controlled, loss of underground water is effectively controlled, construction and operation safety is ensured, and the shallow tunneling method for the pipe-proof-supporting structure combined system is particularly suitable for the situation that an ultra-shallow berried oversized section saturated tunnel penetrates through the sensitive buildings underground.
Description
Technical field
The invention belongs to the Underground Construction field, be specifically related to a kind of pipe curtain-supporting and protection structure combined system shallow burial hidden digging (PSSE), it is applicable to the engineering of under the shallow large-section underground structure of saturated rich water soft soil layer, wearing Sensitive Buildings.
Background technology
Along with the acceleration of Urbanization Process In China, build Large Underground Structure and get more and more under downtown roads or important building, as Urban underground Tunnel, subway station, underground parking etc.At present, build the engineerings such as Urban underground Tunnel, City Subway Station, underground parking below existing road or building, mainly contain cut and cover method, shield method and shallow burial hidden digging.Cut and cover method has not only destroyed environment, and original road surface is excavated, and has hindered the unimpeded of traffic, has affected building safety, to the city productive life, disturbs larger.For the large section of shallow embedding, short-range tunnel, it is obviously uneconomic adopting shield construction, is also infeasible.Poor when the geology condition, buried depth is more shallow, and when Sensitive Buildings is arranged at top, if adopt general shallow burial hidden digging construction, security risk is larger, and surface settlement is difficult to control, once construction accident occur, the social influence caused is remarkable.Therefore, how to find a kind of shallow buried covered excavation method of wearing Sensitive Buildings under shallow large-section underground structure that is suitable for saturated rich water soft soil layer very urgent.
Summary of the invention
The objective of the invention is to be for the above-mentioned problems in the prior art, a kind of pipe curtain-supporting and protection structure combined system shallow burial hidden digging (PSSE) is provided, the steel pipe of different-stiffness and underground support structure are combined, form the vertically common stress system of large rigidity ring, can strictly control sedimentation, guarantee construction and operation security, be specially adapted to wear Sensitive Buildings under super shallow embedding large section saturated soft soil tunnel, also be applicable to down wear the engineering such as City Subway Station under the Shallow tunnel with large cross-section, complex geological condition of the existing road in city or important building.This method can be controlled the loss of underground water effectively, reduce while excavating the disturbance of the contiguous soil body the distortion of corresponding minimizing surrounding soil, while reaching excavation, strict control sedimentation, do not affect land operations, and maintain the normal usage function of top building, road and pipeline.
To achieve these goals, the present invention adopts following technical measures:
The present invention relates to the novel tunneling construction method of a kind of shallow large-section underground structure; be included in the underground structure two ends and form two vertical active wells; then form the pipe curtain at Main Underground body structure periphery; and by the soil body between slip casting or freezing reinforcing steel pipe; form the watertightness underground space; under the protection of pipe curtain, excavation limit, limit is supported, and forms successively first floor combination supporting system and second layer Main Underground body structure.
The shallow buried covered excavation construction that the invention solves that City Terrain is restricted, wears Sensitive Buildings under the large section underground structure in the poor zone of geological conditions, have wide future in engineering applications and market popularization value.
A kind of pipe curtain-supporting and protection structure combined system shallow burial hidden digging comprises the following steps:
Step 1, form two vertical active wells at Main Underground body structure two ends;
Step 2, between two vertical active wells, the periphery of Main Underground body structure to be onstructed forms the pipe curtain, first to the stressed unfavorable position of Main Underground body structure surrounding, head into large diameter steel pipe as prover pipe, then interval jacking minor-diameter steel-tube in order between prover pipe;
Step 3, by slip casting or freezing method, reinforce the soil body between large diameter steel pipe and minor-diameter steel-tube, form the watertightness underground space;
Step 4, under the protection of the pipe curtain of large diameter steel pipe and minor-diameter steel-tube combination, limit excavation soil body limit construction initial support structure, the initial support structure consists of hoop steel arch support and sprayed mortar, between hoop steel arch support and pipe curtain steel pipe, connected mode is welding, in the ring of hoop steel arch support, by inner temporary supporting, is strengthened and fixed;
Step 5, reach predetermined value when above in the initial support structural strength, and a minute step is removed inner temporary supporting, applies the Main Underground body structure, and Main Underground body structure section configuration is the ellipse that multi-section circular arc forms, and is reinforced concrete structure.
In step 2 as above, the diameter range of large diameter steel pipe is 1.5 ~ 3.0m; The diameter range of minor-diameter steel-tube is 0.6 ~ 1.5m.
In step 4 as above, the interior soil excavation of Main Underground body structure sequentially is followed successively by the top soil body, the middle part soil body and the bottom soil body; Each section initial support structure closelyed follow and applied after the appropriate section soil excavation, every intersegmental part temporary supporting two ends and large diameter steel pipe welding, and middle part and minor-diameter steel-tube weld, and form the combination stressed system of vertical hoop of large rigidity.
In step 4 as above, inner temporary supporting is divided into stull and perpendicular support, adopts steel pipe to support or type steel support, and between stull and perpendicular support, connected mode is welding or bolt connection, and between inner temporary supporting and hoop steel arch support, connected mode is welding.
As above apply the Main Underground body structure apply order for from bottom to top.
The present invention compared with prior art, has the following advantages and effect:
1, propose first size diameter steel pipe compound tube curtain and underground support structure are formed to combination stressed system the large rigidity ring longitudinal stress system that has formed and controllably shown sedimentation, avoided underground water to run off;
2, be specially adapted to wear Sensitive Buildings under super shallow embedding large section saturated soft soil tunnel, also be applicable to down wear the engineering such as City Subway Station under the Shallow tunnel with large cross-section, complex geological condition of the existing road in city or important building;
3, do not affect land operations, and maintain the normal usage function of top building, road and pipeline, in work progress, can guarantee the coast is clear, disturb little to the city productive life.
The accompanying drawing explanation
Fig. 1 is vertical active well structural representation;
Fig. 2 is pipe curtain construction layout schematic diagram;
Fig. 3 is pipe curtain construction vertical section schematic diagram;
Fig. 4 is pipe curtain construction schematic cross section;
Fig. 5 reinforces soil body schematic diagram between steel pipe;
Fig. 6 is Main Underground body structure top soil excavation and supporting construction schematic diagram;
Fig. 7 is Main Underground body structure middle part soil excavation and supporting construction schematic diagram;
Fig. 8 is Main Underground body structure bottom soil excavation and supporting construction schematic diagram;
Fig. 9 applies Main Underground body structure schematic diagram.
The vertical active well of 1-wherein; The 2-large diameter steel pipe; The 3-minor-diameter steel-tube; The soil body between the 4-steel pipe; The 5-top soil body; 6-initial support structure; The inner temporary supporting of 7-; The 8-middle part soil body; The 9-bottom soil body; 10-Main Underground body structure.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
Known according to Fig. 1 ~ 9, for the shallow large-section underground structure in saturated soft ground, this method can be effectively the native sealing of underground structure excavation gear, reduce while excavating the disturbance of the contiguous soil body the distortion of corresponding minimizing surrounding soil, strict control sedimentation while reaching excavation, do not affect land operations, and maintain the normal usage function of top building, road and pipeline, the steps include:
Step 1, form two vertical active wells 1 at Main Underground body structure 10 two ends.Main Underground body structure 10 section configurations are the ellipse that multi-section circular arc forms, and are reinforced concrete structure, are the main permanent force structure of shallow buried covered excavation.The effect of vertical active well 1 is to provide condition for follow-up push pipe and tunneling construction, after having constructed, can carry out backfill or as the passway for escaping between the operating period and pipeline passway to the active well top.In described step 1, the size of vertical active well 1 should meet the requirement of jacking construction and Main Underground body structure excavation construction, and its section configuration generally can be rectangle, can be also the polygon of circular or other shapes.In described step 1, the supporting and protection structure of vertical active well 1 has relation with the size of vertical active well 1, is steel sheet pile or diaphragm wall, preferentially adopts diaphragm wall.
Step 2, then between two vertical active wells 1, the periphery of Main Underground body structure 10 to be onstructed forms the pipe curtain.By the Main Underground body structure 10 vertical active wells 1 in two ends, first to the stressed unfavorable position of Main Underground body structure 10 surrounding (such as agent structure top, bottom etc.), head into large diameter steel pipe 2 as prover pipe, then interval jacking minor-diameter steel-tube 3 in order between prover pipe, form the pipe curtain.In described step 2, periphery size diameter steel pipe shape is generally circle, minor-diameter steel-tube 2 diameters are selected in 0.6 ~ 1.5m scope, and large diameter steel pipe 3 diameters are selected in 1.5 ~ 3.0m scope, mainly should consider to meet the size of next stage Main Underground body structure size and the size of overlying burden.
Step 3, reinforce the soil body 4 between steel pipe by the size diameter steel pipe, forms the watertightness underground space.In described step 3, by the size diameter steel pipe, reinforce the soil body 4 between steel pipe, can adopt slip casting or freezing method to reinforce.
Step 4; under the protection of size diameter steel pipe compound tube curtain; carry out the construction of Main Underground body structure shallow buried covered excavation; limit excavation soil body limit construction initial support structure 6; initial support structure 6 consists of steel arch support and sprayed mortar, and between initial support structure steel arch support and pipe curtain steel pipe, connected mode is welding.In described step 4, in the Main Underground body structure, soil excavation sequentially is followed successively by the top soil body 5, the middle part soil body 8 and the bottom soil body 9; In described step 4, each section initial support structure 6 closelyed follow and applied after the appropriate section soil excavation, initial support structure 6 consists of hoop steel arch support and the sprayed mortar arranged according to certain longitudinal pitch, every section hoop steel arch support two ends and large diameter steel pipe welding, middle part and minor-diameter steel-tube welding, form the combination stressed system of vertical hoop of large rigidity, strengthened and fixed by inner temporary supporting 7 in the ring of the hoop steel arch support of elementary supporting and protection structure 6; In described step 4, inner temporary supporting 7 is divided into stull and perpendicular support, adopt steel pipe support or type steel support, between inner temporary supporting 7, connected mode is welding or bolt connection, and between inner temporary supporting and initial support structure 6 steel arch supports, connected mode is welding.
Step 5, initial support structure 6 intensity in the combination supporting system reach 70% when above (predetermined value) of design load, and a minute step is removed inner temporary supporting 7, applies Main Underground body structure 10.Main Underground body structure 10 section configurations are the ellipse that multi-section circular arc forms, and are reinforced concrete structure, are the main permanent force structure of shallow buried covered excavation.In described step 5, the Main Underground body structure apply order for from bottom to top.
This method is worn in the application process of Sensitive Buildings under certain tunnel excavation at home, and because this building geographical position is special, political significance is great, constructing tunnel can not affect greatly it.Due to the high about 19m of tunneling section excavated section, wide about 20m, excavated section reaches 345m
2, buried depth is 5 ~ 6m only, and the stratum of Tunnel Passing is the rich water soft soil layers such as mud, silt clay, silty clay, and water pressure is large, and difficulty of construction is very big, the precedent that does not have at home similar tunnel to build up.This tunnel adopts pipe curtain-supporting and protection structure combined system shallow burial hidden digging (PSSE) construction, has met the Settlement criterion requirement of this building, Sensitive Buildings is not produced to considerable influence, obtains good social effect.
Claims (5)
1. a pipe curtain-supporting and protection structure combined system shallow burial hidden digging, is characterized in that, comprises the following steps:
Step 1, form two vertical active wells (1) at Main Underground body structure (10) two ends;
Step 2, between two vertical active wells (1), the periphery of Main Underground body structure (10) to be onstructed forms the pipe curtain, first to the stressed unfavorable position of Main Underground body structure (10) surrounding, head into large diameter steel pipe (2) as prover pipe, then interval jacking minor-diameter steel-tube (3) in order between prover pipe;
Step 3, reinforce the soil body (4) between large diameter steel pipe (2) and minor-diameter steel-tube (3) by slip casting or freezing method, the formation watertightness underground space;
Step 4, under the protection of the pipe curtain of large diameter steel pipe (2) and minor-diameter steel-tube (3) combination, limit excavation soil body limit construction initial support structure (6), initial support structure (6) consists of hoop steel arch support and sprayed mortar, between hoop steel arch support and pipe curtain steel pipe, connected mode is welding, in the ring of hoop steel arch support, by inner temporary supporting (7), is strengthened and fixed;
Step 5, reach predetermined value when above in initial support structure (6) intensity, a minute step is removed inner temporary supporting (7), applies Main Underground body structure (10), Main Underground body structure (10) section configuration is the ellipse that multi-section circular arc forms, and is reinforced concrete structure.
2. a kind of pipe curtain according to claim 1-supporting and protection structure combined system shallow burial hidden digging, is characterized in that, the diameter range of large diameter steel pipe in described step 2 (2) is 1.5 ~ 3.0m; The diameter range of minor-diameter steel-tube (3) is 0.6 ~ 1.5m.
3. a kind of pipe curtain according to claim 1-supporting and protection structure combined system shallow burial hidden digging, is characterized in that, in described step 4, the interior soil excavation of Main Underground body structure sequentially is followed successively by the top soil body (5), the middle part soil body (8) and the bottom soil body (9); Each section initial support structure (6) is immediately following applying after the appropriate section soil excavation, and every intersegmental part temporary supporting (7) two ends and large diameter steel pipe (2) weld, and middle part and minor-diameter steel-tube (3) weld, and forms the combination stressed system of vertical hoop of large rigidity.
4. a kind of pipe curtain according to claim 3-supporting and protection structure combined system shallow burial hidden digging, it is characterized in that, in described step 4, inner temporary supporting (7) is divided into stull and perpendicular support, adopt steel pipe support or type steel support, between stull and perpendicular support, connected mode is welding or bolt connection, and between inner temporary supporting (7) and hoop steel arch support, connected mode is welding.
5. a kind of pipe curtain according to claim 1-supporting and protection structure combined system shallow burial hidden digging, is characterized in that, described apply Main Underground body structure (10) apply order for from bottom to top.
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033160A (en) * | 2014-06-11 | 2014-09-10 | 同济大学 | Novel support method applicable to shallow-buried subsurface tunnel of soft soil stratum |
| CN104358263A (en) * | 2014-10-13 | 2015-02-18 | 上海市政工程设计研究总院（集团）有限公司 | Foundation pit supporting method used below existing comprehensive pipe rack |
| CN104895121A (en) * | 2015-05-27 | 2015-09-09 | 北京市市政工程设计研究总院有限公司 | Transverse partition method for reducing ground surface settlement and building structure deformation of underground structure construction |
| CN105370289A (en) * | 2015-12-14 | 2016-03-02 | 中建六局土木工程有限公司 | Ultra-long shallow-buried excavation construction method for existing pipeline in complex environment |
| CN105863683A (en) * | 2016-05-31 | 2016-08-17 | 中铁第四勘察设计院集团有限公司 | Large cross-section tunnel longitudinal and ring beam pre-supporting structure |
| CN106437781A (en) * | 2016-10-25 | 2017-02-22 | 中铁第四勘察设计院集团有限公司 | Upper-soft lower-hard stratum tunnel supporting structure and construction method thereof |
| CN106761814A (en) * | 2017-02-08 | 2017-05-31 | 海南大学 | A kind of pipe curtain and bamboo reinforcement grouted anchor bar combined retaining structure and method |
| CN106759464A (en) * | 2017-01-18 | 2017-05-31 | 王燏斌 | A kind of hypogee and its construction method |
| CN106958448A (en) * | 2017-05-16 | 2017-07-18 | 宁波市交通建设工程试验检测中心有限公司 | A kind of shallow tunnel construction method and system |
| CN108252307A (en) * | 2018-02-28 | 2018-07-06 | 武汉市政工程设计研究院有限责任公司 | A kind of foundation pit construction method for underground tunnel upper |
| CN108612542A (en) * | 2016-12-12 | 2018-10-02 | 姚晓宁 | A kind of novel soil improvement conduit grouting construction process |
| CN109268014A (en) * | 2018-07-25 | 2019-01-25 | 中煤特殊凿井有限责任公司 | A kind of water-rich sand layer shallow tunnel pipe curtain frozen construction models for temperature field experimental box |
| CN110130901A (en) * | 2019-04-26 | 2019-08-16 | 中铁二十三局集团第六工程有限公司 | On across both wired Urban Underground mining sectbn construction methods |
| CN110273696A (en) * | 2019-06-11 | 2019-09-24 | 中铁十四局集团第二工程有限公司 | A kind of tunnel or underground space claustra formula construction method |
| CN111485575A (en) * | 2019-12-26 | 2020-08-04 | 上海申通地铁集团有限公司 | Steel frame support construction method for pipe curtain channel with oversized cross section in saturated soft soil area |
| CN112359868A (en) * | 2020-11-02 | 2021-02-12 | 上海市城市建设设计研究总院（集团）有限公司 | Underground passage construction method closely attached to existing underground structure |
| CN113175335A (en) * | 2021-05-25 | 2021-07-27 | 中铁南方投资集团有限公司 | Prestress connecting device of small-diameter pipe curtain structure and construction method thereof |
| CN114542091A (en) * | 2022-04-26 | 2022-05-27 | 中国铁路设计集团有限公司 | Advanced pre-support construction method and structure for small-caliber pipe curtain of underground excavation close-connection project |
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| CN104033160A (en) * | 2014-06-11 | 2014-09-10 | 同济大学 | Novel support method applicable to shallow-buried subsurface tunnel of soft soil stratum |
| CN104358263A (en) * | 2014-10-13 | 2015-02-18 | 上海市政工程设计研究总院（集团）有限公司 | Foundation pit supporting method used below existing comprehensive pipe rack |
| CN104358263B (en) * | 2014-10-13 | 2019-08-09 | 上海市政工程设计研究总院（集团）有限公司 | Foundation pit supporting method in existing pipe gallery lower part |
| CN104895121A (en) * | 2015-05-27 | 2015-09-09 | 北京市市政工程设计研究总院有限公司 | Transverse partition method for reducing ground surface settlement and building structure deformation of underground structure construction |
| CN105370289B (en) * | 2015-12-14 | 2017-09-05 | 中建六局土木工程有限公司 | A kind of existing pipeline overlength Dryopteris sublaetaChing et Hsu method of complex environment |
| CN105370289A (en) * | 2015-12-14 | 2016-03-02 | 中建六局土木工程有限公司 | Ultra-long shallow-buried excavation construction method for existing pipeline in complex environment |
| CN105863683A (en) * | 2016-05-31 | 2016-08-17 | 中铁第四勘察设计院集团有限公司 | Large cross-section tunnel longitudinal and ring beam pre-supporting structure |
| CN105863683B (en) * | 2016-05-31 | 2018-12-28 | 中铁第四勘察设计院集团有限公司 | Large cross-section tunnel indulges ring beam and pays protection structure in advance |
| CN106437781B (en) * | 2016-10-25 | 2019-04-19 | 中铁第四勘察设计院集团有限公司 | A kind of upper-soft lower-hard ground tunnel support structure and its construction method |
| CN106437781A (en) * | 2016-10-25 | 2017-02-22 | 中铁第四勘察设计院集团有限公司 | Upper-soft lower-hard stratum tunnel supporting structure and construction method thereof |
| CN108612542A (en) * | 2016-12-12 | 2018-10-02 | 姚晓宁 | A kind of novel soil improvement conduit grouting construction process |
| CN106759464A (en) * | 2017-01-18 | 2017-05-31 | 王燏斌 | A kind of hypogee and its construction method |
| CN106761814A (en) * | 2017-02-08 | 2017-05-31 | 海南大学 | A kind of pipe curtain and bamboo reinforcement grouted anchor bar combined retaining structure and method |
| CN106958448B (en) * | 2017-05-16 | 2019-04-12 | 宁波市交通建设工程试验检测中心有限公司 | A kind of shallow tunnel construction method and system |
| CN106958448A (en) * | 2017-05-16 | 2017-07-18 | 宁波市交通建设工程试验检测中心有限公司 | A kind of shallow tunnel construction method and system |
| CN108252307A (en) * | 2018-02-28 | 2018-07-06 | 武汉市政工程设计研究院有限责任公司 | A kind of foundation pit construction method for underground tunnel upper |
| CN109268014A (en) * | 2018-07-25 | 2019-01-25 | 中煤特殊凿井有限责任公司 | A kind of water-rich sand layer shallow tunnel pipe curtain frozen construction models for temperature field experimental box |
| CN110130901A (en) * | 2019-04-26 | 2019-08-16 | 中铁二十三局集团第六工程有限公司 | On across both wired Urban Underground mining sectbn construction methods |
| CN110273696A (en) * | 2019-06-11 | 2019-09-24 | 中铁十四局集团第二工程有限公司 | A kind of tunnel or underground space claustra formula construction method |
| CN111485575A (en) * | 2019-12-26 | 2020-08-04 | 上海申通地铁集团有限公司 | Steel frame support construction method for pipe curtain channel with oversized cross section in saturated soft soil area |
| CN112359868A (en) * | 2020-11-02 | 2021-02-12 | 上海市城市建设设计研究总院（集团）有限公司 | Underground passage construction method closely attached to existing underground structure |
| CN113175335A (en) * | 2021-05-25 | 2021-07-27 | 中铁南方投资集团有限公司 | Prestress connecting device of small-diameter pipe curtain structure and construction method thereof |
| CN114542091A (en) * | 2022-04-26 | 2022-05-27 | 中国铁路设计集团有限公司 | Advanced pre-support construction method and structure for small-caliber pipe curtain of underground excavation close-connection project |
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Application publication date: 20140101 |