CN101967832B

CN101967832B - Method for treating bottom structure of building in substation

Info

Publication number: CN101967832B
Application number: CN200910055437.4A
Authority: CN
Inventors: 李运明
Original assignee: Shanghai Intelligence Power Engineering Co Ltd
Current assignee: Shanghai Intelligence Power Engineering Co Ltd
Priority date: 2009-07-27
Filing date: 2009-07-27
Publication date: 2013-04-24
Anticipated expiration: 2029-07-27
Also published as: CN101967832A

Abstract

The invention discloses a method for treating the bottom structure of a building in a substation. In the method, a bearing platform, a foundation beam positioned above the bearing platform and a reinforced concrete board structural layer positioned above the foundation beam are arranged at the bottom of the building. The treatment method is easy to construct and thoroughly solves the problem of the differential settlement of the building bottom in the substation on a soft soil foundation.

Description

Method for treating bottom structure of building in substation

Technical field

The present invention relates to the structure foundation processing technology field, relate in particular to a kind of processing method that is applicable to the architecture bottom layer structure of soft foundation.

Background technology

When the ground of construction of buildings, it is a kind of known method that the concrete foundation beam is connected with the concrete pile of being driven underground, and the constructions work that can be afterwards with the method provides good foundation support.Generally the bottom at building only adopts the traditional design methods such as floor, girt strip usually, perhaps just adopts the methods such as rammed earth or pool slag backfill to process, and needn't improve or strengthen the stressed processing of bottom.

Because the relevant device load of placing in the building of electric substation is larger, such as 35kv device chamber, master control building, the equipment such as switchboard placed of the bottom of protecting chamber etc. of continuing, so electric substation in the substructure of building usually than the general larger bearing capacity of building needs.To build on the soft foundation in the 220kv power transformation of building all quite a few; engineering geological conditions is complicated; after part transformer station builds up one to two year; 35kv switch gear room land subsidence occurred and caused that switchboard can't open; the guarantor's chamber depression that continues causes the phenomenons such as protection screen inclination, thereby has affected the normal operating of electric substation.

The reason that above-mentioned phenomenon produces mainly is owing to the bottom to electric substation's building just adopts the conventional design such as floor, girt strip, perhaps only adopts the method processing such as rammed earth, and considers to adopt the design that strengthens the bottom bearing capacity.The transformer station that such phenomenon often occurs all is in bad geological environment as building on the soft foundation, foundation soil in 5 meters depth boundses of its below ground can not satisfy the use of upper load, be that bearing capacity does not reach requirement, like this after building up in the operation one or two years electric substation part building will produce the differential settlement of ground floor.

In common architecture bottom layer design, in order to reduce differential settlement, prevent distortion, basic straining beam is used to connect and coordinate only base (cushion cap) or the grade beam at building two ends, it can pass to each basis to horizontal loading equably, sometimes also can serve as the basis of top body of wall.Many straining beams concur, and can be unified into the basis that rigidity is coordinated, distortion is consistent to whole building foundation.

But because indoor a lot of equipment and the cable trench etc. of being furnished with of electric substation's bottom, the architecture bottom layer that is designed for electric substation with basic straining beam still can not well address the above problem like this.

Summary of the invention

In order fundamentally to solve the problem of the differential settlement that the electric substation's architecture bottom layer build on the soft foundation occurs, the inventor is through long-term research, technical scheme of the present invention has been proposed, consider that namely the bottom ± 0.000 layer of position below the flooring at the larger building of load makes a deck, the load on top is all passed on the basis of building.

Concrete, the processing method of electric substation of the present invention architecture bottom layer structure is to arrange a deck at the bottom of building, and it comprises cushion cap, be positioned at the grade beam of cushion cap top, be positioned at one deck reinforced concrete slab of grade beam top.In the method for the invention, below the bottom of building, be abound with and put described deck, and described deck is connected with the basis of building, become as a whole.

In processing method of the present invention, the terms such as related cushion cap, grade beam all refer to the concept that building field is general, not special definition.Grade beam refers to the beam on the basis, and its Main Function is the basis as top-out, and upper load is delivered on the ground, plays load-bearing and bending resistance function.Grade beam generally is used for frame construction, shear force of frame wall construction, frame column fall within on the grade beam or the grade beam crosspoint on.Usually, the cross section of grade beam is larger, and depth of section is generally got 1/4～1/6 span, and the rigidity of grade beam is very large like this, and its arrangement of reinforcement can be by calculative determination.

In processing method of the present invention, the number of cushion cap and other design parameters all need satisfy the basic demand of building superstructure safe handling, and those skilled in the art can determine according to calculating easily.Usually, layout cushion cap below the end frame trestle of building.In the method for the invention, preferably the span centre at building increases layout one cushion cap, take cushion cap as fulcrum, arranges grade beam, forms main force transferring structure.Same, the quantity of foundation girder and secondary beam also can calculating by routine.The main purpose that increases cushion cap in the centre position of building span (being span centre) is in order to reduce basic depth of beam and arrangement of reinforcement.While also is that the design for pile foundation and two newel posts is very favourable like this for the size of power at the bottom of the post of the frame column that reduces both sides.

In processing method of the present invention, the surface layer absolute altitude of described cushion cap and the surface layer absolute altitude of described deck be at same position, and be positioned at and be not less than 1.1 meters position below 0.000 layer.The surface layer absolute altitude of described deck is positioned at the position of 1.1 meters of described 0.000 layer of belows.Described 0.000 layer is the indoor relative elevation of bottom of expression building.The position that deck is set is selected, and mainly is the needs that pass through in order to satisfy cable trench, in practice of construction, can fluctuate according to designing requirement.

In the method for the invention, described reinforced concrete slab is covered with the below of described architecture bottom layer usually.In a preferred embodiment of the invention, the thickness of the reinforced concrete slab of described deck is 150mm.

In the processing method of architecture bottom layer structure of the present invention, according to the requirement of described bottom top device position, the partially filled aerated concrete building block of non-stress between described deck and 0.000 layer; The part of the force adopts cement brick to build by laying bricks or stones.The part of the force refers to produce larger load and satisfies the position of placing relevant device; Non-stress partly refers to place the position of relevant device.Such structural form can either alleviate the weight of structure self, also makes things convenient for the requirement of the constructions such as pipe laying simultaneously.The part of the force adopts cement brick 0.000 layer of power of carrying all can be passed to deck and above the grade beam.

When implementation of the present invention, preferred described part of the force adopts the thick cement brick of 240mm to build by laying bricks or stones.

Use the substructure of the building that method of the present invention processes, concerning a building such as 35kv device chamber, the deck of doing on the building foundation below its bottom is one, and integral body of the basis of described deck and this building formation.So just the load integral body with bottom passes on the basis of building, thereby the differential settlement phenomenon can not occur, and has satisfied long-term normal operating and the operation of equipment of interior of building.

In the design of electric substation, as when finding that institute's district's ground has the weak soil phenomenon to exist, the architecture bottom layer of distinguishing is all increased a deck, so just fundamentally solved a uneven subsidence that architecture bottom layer occurs in the electric substation on soft foundation.

Processing method for electric substation's architecture bottom layer structure of the present invention, also can be used for other similar geological conditions need to the processing than the substructure of the building of large bearing capacity in.

Description of drawings

Fig. 1 is the part schematic diagram of 35kv device chamber bottom.

Fig. 2 is the schematic diagram of the 1-1 section of 35kv device chamber substructure.

Wherein, the 1-cushion cap, the 2-pile for prestressed pipe, 3-cable furrow bank embedded part, the 4-cable trench, the 5-cement brick, the 6-grade beam, the C20 concrete face that 7-150mm is thick, the 8-air-entrained concrete building block, the 9-reinforced concrete slab, 10-building frame post, the 11-architecture enclosing protects brick wall

The specific embodiment

The below is described in further detail processing method of the present invention by reference to the accompanying drawings as an example of the part of 35kv device chamber example.

Indoor a large amount of equipment and the cable trench etc. arranged in 35kv device chamber bottom building.The needs that pass through in order to satisfy cable trench when structure design, determine that at first near the position under 0.000 layer-1.1 meters increases a deck, and concrete way is as follows:

Cushion cap 1 is set below the frame column of building, in order to reduce the basic depth of beam of this layer and arrangement of reinforcement, the span centre in 35kv device chamber ,-1.1 meters position increases as requested a cushion cap 1 is set under 0.000 layer; Take cushion cap as fulcrum, arrange the grade beam 6 of respective numbers-1.1 meters positions;-1.1 meters the thick reinforced concrete slab 9 of location arrangements one deck 150mm on the position of grade beam; In described deck reinforced concrete slab 9 above and the non-stress between 0.000 layer partly adopt aerated concrete building block 8 as packed layer, place the part of the force of relevant device and adopt 240 thick cement bricks 5 to build by laying bricks or stones; Lay at last the thick C20 concrete face 7 of 150mm.

The profile of the substructure that process processing method of the present invention obtains is referring to Fig. 2.

Through above-mentioned processing, by beam, the plated construction of arranging, just 0.000 layer equipment load all is delivered on the frame column at the cushion cap foundation of bottom intermediate arrangement of building and two ends, house, after the equipment work more than 0.000 layer, make they and building become as a whole fully, so just can not produce the problem of differential settlement, just can guarantee that the equipment of bottom operation is with the equally normal operation of equipment of the second layer and other layer operation.

Claims

1. the processing method of substation's architecture bottom layer structure is characterized in that: arrange a deck at the bottom of building, it comprises cushion cap, be positioned at the grade beam of cushion cap top, be positioned at one deck reinforced concrete slab of grade beam top; The partially filled aerated concrete building block of non-stress is as packed layer between described deck and 0.000 layer; Placing the part of the force of relevant device adopts cement brick to build by laying bricks or stones; Lay at last the thick C20 concrete face of 150mm;

Described deck is connected with the basis of described building, becomes as a whole;

Span centre at described building increases layout one cushion cap, take cushion cap as fulcrum, arranges grade beam;

The surface layer absolute altitude of described cushion cap and the surface layer absolute altitude of described deck are at same position;

The surface layer absolute altitude of described deck is positioned at below 0.000 layer 1.1 meters position;

The thickness of described reinforced concrete slab is 150mm;

Described part of the force adopts the thick cement brick of 240mm to build by laying bricks or stones.