CN203321523U

CN203321523U - Large-span high-side-wall underground space building

Info

Publication number: CN203321523U
Application number: CN2013203674670U
Authority: CN
Inventors: 刘要来; 赵一航; 乔净净; 赵红敏
Original assignee: Hydrochina Zhongnan Engineering Corp
Current assignee: PowerChina Zhongnan Engineering Corp Ltd; Hydrochina Zhongnan Engineering Corp
Priority date: 2013-06-26
Filing date: 2013-06-26
Publication date: 2013-12-04
Anticipated expiration: 2023-06-26

Abstract

The utility model discloses a large-span high-side-wall underground space building and aims to solve the problems that a conventional underground space building is large in tunneling surface, complex in construction process, long in construction period and high in excavation and support cost, and doesn't adapt to deformation characteristics of soft strata. The large-span high-side-wall underground space building comprises an underground space building body, wherein a plurality of side boundary prestressing anchor holes are formed in the position of a side wall boundary line of the underground space building body; a plurality of boundary line outside prestressing anchor holes are formed in the outer side of the side wall boundary line of the underground space building body; the side boundary prestressing anchor holes and the boundary line outside prestressing anchor holes are communicated through corresponding through prestressing anchor holes; and through prestressing anchor rods or cables are arranged in the through prestressing anchor holes. According to the large-span high-side-wall underground space building, small hole cavities dug in the soft strata are formed easily; anchoring is performed firstly, and then digging is performed; and the large-span high-side-wall underground space building is dug according to the prior art. The excavation and support are simple, and the building is stable.

Description

A kind of large span high side wall underground space building

Technical field

The utility model relates to excavation supporting field, a kind of underground structure, is specially a kind of large span high side wall underground space building, is mainly used in soft stratum large span, high side wall underground space building.

Background technology

21 century, development along with Chinese national economy, the needs of the adjustment of national strategy, national defense construction and urban infrastructure development, underground large span high side wall space structures increases gradually, as large span pumped storage underground power house, underground military storage, antiaircraft facility, subway tunnel etc., and rock weakness in the region that requires to build often, the cavitation condition is poor.Adopt existing excavation supporting technology, i.e. layer and section, limit excavation limit supporting, excavation construction difficulty is large, cost is high, often excavation is afterwards not as good as supporting, just produce distortion and collapse, causing personnel, equipment, property loss, occurring yielding and the phenomenon of addressing again.

The utility model content

Large in order to overcome existing large span high side wall underground space building excavation supporting development end, complicated construction technique, long in time limit, incompatible with the deformation characteristic of soft stratum, the excavation supporting expense is high not enough, the utility model aims to provide a kind of large span high side wall underground space building, utilize the small-sized cavern of excavation in soft stratum easily to form, by digging after first anchor, after the soft stratum of crown and high side wall certain limit being reinforced in advance, by prior art, large span high side wall underground space building is excavated again, excavation supporting is simple, building is firm.

To achieve these goals, the technical scheme that the utility model adopts is: a kind of soft stratum large span high side wall underground space building, comprise underground space structure trunk, its design feature is, the place, side edge boundary line of described underground space structure trunk offers Chu Yumao hole, a plurality of sideline, and the outside, side edge boundary line of this underground space structure trunk offers Wai Yumao hole, a plurality of boundary line; Between described Chu Yumao hole, a plurality of sideline and Wai Yumao hole, a plurality of boundary line, by being communicated with wearing pre-anchor hole accordingly, each is provided with wearing prestressed anchor or rope wearing in pre-anchor hole.

Further, the bearing of trend in Wai Yumao hole, Chu Yumao Dong He boundary line, described sideline is consistent with the bearing of trend of underground space structure trunk hole.

Excavation supporting method of the present utility model comprises the steps:

Chu Yumao hole, a plurality of sideline is excavated at the place, sideline of the underground space structure trunk 1) designed the next-door neighbour in advance; The outside, sideline at underground space structure trunk offers Wai Yumao hole, a plurality of boundary line;

2) bore wearing pre-anchor hole, by the corresponding connection in Wai Yumao hole, Chu Yumao Dong He boundary line, sideline, and install wearing prestressed anchor or rope wearing in pre-anchor hole at brill, before large span high side wall underground space building excavation, implement prestress anchoraging;

3) the large span high side wall underground space building of design carried out to excavation supporting.

Large span high side wall underground space building described in the utility model is the underground space building be arranged in soft stratum, has solved prior art and has met with soft stratum and yield and the problem of addressing again.

By said structure, the utility model at next-door neighbour sideline, underground structure and sideline periphery certain limit place, excavate in advance series as anchoring, use hold, implement bore operation duck eye (being called pre-anchor hole); Utilize pre-anchor hole to implement bore operation, UNICOM, with layer and corresponding pre-anchor hole, utilizes pre-anchor hole, boring to implement prestress anchoraging before the longspan underground structure excavation; After above-mentioned first anchor measure is implemented, then use conventional method to carry out the excavation supporting of longspan underground structure.

Compared with prior art, the beneficial effects of the utility model are:

1) soft rock mass in longspan underground structure top, abutment wall certain limit has been carried out reinforcing in advance before excavation, safeguarded and improved the mechanical property of soft rock mass, for the safety of underground structure excavation and follow-up conventional supporting provides assurance.

2) the first pre-anchor hole of excavation, next-door neighbour building sideline as construction period temporary drainage hole, the permanent drainage tunnel of conduct of periphery, can effectively reduce construction period and runtime groundwater level, reduces the water ballast(ing) effect, reduces follow-up support engineering amount.

The pre-anchor hole of 3) first excavating, as the Supplementary Exploration hole of construction period, more be conducive to accurately hold geological condition, for follow-up underground structure excavation provides the foundation.

4) next-door neighbour De Yumao hole, building sideline is arranged in the sideline, underground structure, as the part of permanent section, without increasing in addition investment.

In sum, the shortcomings such as the utility model has overcome that the prior art development end is large, complicated construction technique, long in time limit, incompatible with the deformation characteristic of soft stratum, excavation supporting expense height, and simple in structure, economical rationality, easy construction, be applicable to the excavation construction of the longspan underground structure under different geological conditions, especially soft stratum large span high retaining wall underground structures.

Below in conjunction with drawings and Examples, the utility model is further elaborated.

The accompanying drawing explanation

Fig. 1 is the structure principle chart of an embodiment of the utility model;

The schematic cross-sectional view that Fig. 2 is Fig. 1.

In the drawings

1-underground space structure trunk; Chu Yumao hole, 2-sideline; Wai Yumao hole, 3-boundary line;

4-is to wearing pre-anchor hole; 5-is to wearing prestressed anchor or rope.

The specific embodiment

A kind of soft stratum large span high side wall underground space building, as illustrated in fig. 1 and 2, comprise underground space structure trunk 1, Chu Yumao hole, sideline 2, Wai Yumao hole, boundary line 3, to wearing pre-anchor hole 4, to wearing prestressed anchor or rope 5.

The concrete steps of large span high side wall underground space building excavation supporting method are:

At first, near design underground space structure trunk 1 structure sideline reaches, the corresponding pre-anchor hole 2,3 that can hold, implement bore operation is excavated respectively at the certain limit place;

Secondly, the pre-anchor hole 2 of correspondence with bore and dig wearing anchor hole 4 between anchor hole 3 in advance; Then, utilize and implement wearing prestressed anchor or rope 5 in pre-anchor hole 2,3 wearing anchor hole 4, to before the longspan underground structure excavation, implementing pre-anchoring;

Finally, utilize pre-anchor hole 2,3 drainage, to wear prestressed anchor or rope 5 and anchorage effect, form under metastable wall rock condition, use conventional excavation technology to carry out the excavation supporting work of underground structure.

The double construction period temporary drainage hole of doing, Chu Yumao hole, sideline described in the utility model 2, Wai Yumao hole 3, sideline is as the permanent draining in underground structure 1 and deformation observation gallery, to wearing prestressed anchor or rope 5 as the permanent supporting measure in underground structure 1, with the excavation supporting measure of follow-up underground structure 1, form rationally, efficient system excavation supporting structure, guaranteed the safety and stability of 1 construction period of underground structure and runtime.

The content that above-described embodiment is illustrated should be understood to these embodiment only for being illustrated more clearly in the utility model, and be not used in the restriction scope of the present utility model, after having read the utility model, those skilled in the art all fall within the application's claims limited range to the modification of the various equivalent form of values of the present utility model.

Claims

1. a large span high side wall underground space building, comprise underground space structure trunk (1), it is characterized in that, the place, side edge boundary line of described underground space structure trunk (1) offers Chu Yumao hole, a plurality of sideline (2), and the outside, side edge boundary line of this underground space structure trunk (1) offers Wai Yumao hole, a plurality of boundary line (3); Between described Chu Yumao hole, a plurality of sideline (2) and Wai Yumao hole, a plurality of boundary line (3), by being communicated with wearing pre-anchor hole (4) accordingly, each is provided with wearing prestressed anchor or rope (5) wearing in pre-anchor hole (4).

2. large span high side wall underground space building according to claim 1, is characterized in that, the bearing of trend in Chu Yumao hole, described sideline (2) and Wai Yumao hole, boundary line (3) is consistent with the bearing of trend of underground space structure trunk (1) hole.