SU1756465A1 - Wall of underground structure - Google Patents

Abstract

Use: walls of underground structures, fencing pits. The essence of the invention: the fence is assembled from prefabricated panels, combined in arched sections. The ends of the sections are interconnected by horizontal fastenings. 4 il.

Description

The invention relates to the construction of underground structures, in particular to the walls enclosing the trenches of underground structures.

A technical solution is known for a retaining wall consisting of wall structures made by the wall in the ground and spacer structures (pipes, rolled sections, floors) ensuring the stability of the wall wall during the excavation of the pit under the pressure of the ground.

The disadvantage of this solution is the limited area of effective use, since with spans exceeding 15 meters, the use of spacer elements becomes ineffective. Under these conditions, the stability of the compressed-bent struts is provided by the use of rolled products of considerable size. This, in turn, makes it difficult to carry out works on the excavation passage. All this leads to significant volumes of material and labor costs for retaining walls.

underground structures and ensuring their sustainability in the production process in the construction pit.

The closest technical solution to the proposed technical essence is a wall enclosure of an underground structure, including parallel and curvilinear walls of panels. The stability of a longer wall during the erection process is ensured by the joining of the panels into the arched section with a reinforced concrete beam.

The disadvantage of this solution is the limited scope, namely for small spans (up to 20 m).

With significant spans, the application of this solution is inefficient, since the occurrence of a significant expansion force in the arched section entails the complication of the technical solutions of the wall fence.

The purpose of the invention is to simplify the construction of wall fencing underground structures.

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The goal is achieved by the fact that the ends of each arched section are interconnected by horizontal fasteners and rigidly connected to the ends of adjacent arched sections, while the effort of tension is perceived by puffs.

Figure 1 shows the underground wall enclosure, a plan; figure 2 is the same, a longitudinal section; on fig.Z - the same, cross section; Fig. 4 shows a fragment of the section of the joint of the ends of the arched sections.

The wall fencing of the underground structure includes prefabricated panels 1, metal structures 2 of a rigid joint, an enclosed reinforced concrete beam 3 on top of the last 1, 2, taps 4 connecting the ends of the arched sections.

Wall fence works as follows.

During the passages of the excavation 5 to the depth of the first rus 0 (3-4 m), the stability of the fence under the pressure of the soil 7 is ensured by the operation of the enclosing structures 1.2, as an arched system, due to the redistribution of load on the connecting beam 3 and the lower part of prefabricated panels (located in the ground).

The spacer forces of the arched section are perceived by the casing beam 3 and the ground 7. After the passages of the first tier 6 are taken, the second run of the second trench 8. Next, in the first tier 6, metal hooks 4 are installed, which receive the thrust.

The gutters 4 are attached to the embedded elements 9 ends of 10 arched sections. In this case, the tightening perceives the largest part of the thrust. Further work is carried out cyclically: a fragment of the excavation 5 (and the following), installation of 4 in p-2 Rus. In all cases the thrust is perceived by 4 (and the next ones will take the largest part of the thrust), with soil 7 from the outside, with a grating beam 3. The wall fencing is erected with the following sequence: the preparatory work is carried out on the construction of the retaining wall using the wall in the ground (forshacht construction, planning, installation of the clay-mortar assembly); method wall in the ground construction ts

enclosing wall structures with rigid vertical joints; a top beam 3 is arranged on the top of the enclosing structures; the development of the first b and second 8 rus of land works in the pit 5 is carried out; horizontal fasteners 4 are installed and fixed, positioned within the height of the first tier 6 earthworks; a third is being developed

Rus soil; Further, the installation of the backpans and the development of the next ground floor alternate cyclically. Upon completion of the earthworks (reaching the bottom of the excavation), work is carried out on the bottom structure

facilities. Subsequently, after the installation of internal supporting structures (walls, partitions, floors) that act as spacers, the dismantling is performed. To ensure this

tightening possibilities are located outside the floors, and in vertical walls and partitions they are passed through pipes.

Compared with the prototype, the proposed technical solution has the following technical and economic

Benefits: extends the area of effective use by building structures with large spans (more than 20 m); simplified construction of buildings and

material and labor costs are reduced due to the elimination of technically complex work on the arrangement of additional elements of wall fencing, which perceive space forces.

In each case, the technical and economic efficiency of the proposed solution in comparison with the prototype is determined by the size of the structure; geological and hydrogeological conditions, production

opportunities of the construction organization.

Claims (1)

Claims of the invention Underground wall fencing, including prefabricated panels, combined into arched sections, characterized in that, in order to simplify the construction of the wall fencing, the ends of each arched section are connected between horizontal fasteners and rigidly connected to the ends of adjacent arched sections. 01 tj i, . 3 tO / / FIG 3 z /