CN102587691A

CN102587691A - Dust control method for blasting demolition of building

Info

Publication number: CN102587691A
Application number: CN201210066408XA
Authority: CN
Inventors: 池恩安; 赵明生; 刘庆; 张广荣; 沈晓松; 魏兴
Original assignee: GUIZHOU XINLIAN EXPLOSIVE ENGINEERING Co Ltd
Current assignee: GUIZHOU XINLIAN EXPLOSIVE ENGINEERING Co Ltd
Priority date: 2012-03-14
Filing date: 2012-03-14
Publication date: 2012-07-18

Abstract

The invention discloses a dust control method for blasting demolition of a building, which includes the steps: covering blast holes with water bags, setting a range for the water bags covering the blast holes to be larger than 30cm in radius, building a water tank 13cm high along the wall with each floor as a bottom, and filling the water tank with water 10cm in depth; drilling the floors, and drilling holes on each floor at intervals of 4-5m<2>, wherein the depth of each drilled hole is three quarters of the thickness of each floor slab; allowing the drilled holes to be communicated with cavities in the floor slabs, and injecting water into the drilled holes to fully wet the floor slabs; reserving a skylight on each floor; using water to fully wet an expected blast dreg collapse area and an expected blast wave impact range with water; suspending plastic water containers 5kg in weight at intervals of 4-5m<2> on each floor, and filling the plastic water containers with explosive. By the dust control method, blast dust can be reduced effectively, the building can be broken thoroughly, construction period is quickened, and cost is saved.

Description

A kind of dust-control method of demolition blasting building

Technical field

The present invention relates to a kind of dust-control method of demolition blasting building.

Background technology

Along with the development of urban construction, a lot of original infrastructure, layout of buildings etc. more and more can not satisfy the needs of socio-economic development, even have become the bottleneck of restriction urban development.In order to promote socio-economic development, to improve city function; There is the building in a large amount of planned ranges to remove; Demolition of buildings mainly adopts Controlled Blasting now; Controlled blasting be last century early eighties in the spring tide of reform and opening-up along with resettlement of reconstruction of the old city town and integrated mill or technology innovation project grow up, and obtained application widely, its science, efficient, safe, civilized job practices have demonstrated powerful vitality; Along with the extensive use of engineering explosion, the negative effect of controlled blasting also increases gradually, in today of environmental consciousness pay attention to day by day; People to blasting technique require increasingly high; Not only need control traditional blasting harm such as blasting vibration, slungshot, shock wave, noises, also need effectively control the dust that explosion produces, the controlled blasting demolition of buildings has advantages such as duration weak point; But in blasting process, produce a large amount of dusts; Surrounding enviroment are caused have a strong impact on, particularly be positioned at bustling location and resident concentrated area, this influence is even more serious.At present, take to reduce method that explosion produces dust at the outer high pressure pipe network water spray that is provided with of building, this method workload is big, the implementation process difficulty, satisfied not the needs of current urban development, and dustproof effect is undesirable.

By on can know that the dust-control method of above-mentioned existing demolition blasting building in practical application, obviously has defective and exists, and remain to be improved.

Thus, the improving of the above-mentioned defective of thoughts of the present invention is that the spy concentrates on studies and cooperates and repeatedly practises, and proposes a kind of reasonable in design and effectively improve the method for above-mentioned defective finally.

Summary of the invention

To the weak point of prior art, the present invention aims to provide a kind of dust-control method of demolition blasting building, to guarantee in the process of demolition blasting building, is convenient to operation, and is dustproof satisfactory for result.

For solving the problems of the technologies described above, the method that the present invention adopts comprises following operating procedure:

(1), cover shot hole, with water bag water bag cover shot hole zone radius greater than 30 cm;

(2), be that the high pond of 13 cm is built in the bottom surface along the wall limit with each floor face, the dark water of interior filling 10 cm;

(3), in per 4-5 square metres of each floor face, bore a hole, drilling depth is about 3/4 of slab thickness; Hole and connect the emptying aperture in the floor, then toward hole in water filling, soak floor and soak into;

(4), offer the skylight at the middle part of each each span of floor face;

(5), water and irrigate at collapse zone and blast wave impact scope water of the explosion slag of estimating;

(6), in each floor the plastics water receptacles of per 4-5 square metres of suspension 5 kg, and in this plastics water receptacle, be provided with explosive.

Said skylight is the through hole that is provided with on the floor, and this skylight is of a size of: long 1.5m * wide 1.5m.

Said explosive is an emulsion.

Utilize the said method explosion; At first the inwall of building receives the shock wave effect that aqueous medium transmits; The building wall produces under this strong loading and breaks, and the current that have residual voltage then outwards flow out from the crack, and a part forms the water under high pressure curtain and pours down; Be sprayed in the dust that produces when building disintegrates, the seizure of part formation high energy water smoke is diffused into airborne dust makes its deposition.This method can not only effectively reduce the dust that explosion produces, and can also make building thoroughly broken, accelerates the duration, practices thrift cost.

Description of drawings

Fig. 1 is a column explosion water bag suspension sketch map;

Fig. 2 is a body of wall explosion water bag suspension sketch map;

Fig. 3 is that beam explosion water bag is stacked sketch map;

Fig. 4 floor skylight is provided with sketch map;

Fig. 5 is the water container structure sketch map;

In the accompanying drawing: 7 water receptacles, 8 explosives of 1 column, 2 shot holes, 3 water bags, 4 bodies of wall, 5 beams, 6 skylights.

The specific embodiment

Like Fig. 1, Fig. 2, shown in Figure 3; For building column 1, body of wall 4, the beam 5 of explosion otch are arranged, on shot hole 2 sides and shot hole 2 all side suspension water bags 3, three positions are fixing with the rope binding in water bag 3 upper, middle and lower; For ease of fixing, water bag 3 is cylindrical; Water bag covers the zone radius of shot hole 2 greater than 30 cm, for the bearing wall that does not have the explosion otch 4, can only above body of wall 4 two sides shot holes 2, reach shot hole 2 all side suspension water bags 3; The zone radius that water bag 3 covers shot hole 2 for the beam 5 that does not have explosion otch building, is stacked water bag 3 in shot hole 2 upper surfaces level of beam 5 greater than 30 cm, and water bag 3 covers shot hole 2 zone radius greater than 30cm.In order to reduce the floor explosion airborne dust of moment, at each floor face along the wall limit with the high pond of brick 13 cm, the dark water of interior filling 10 cm; Bore a hole with air pressure gun for per 4-5 square metres at the floor face, drilling depth is about 3/4 of slab thickness; The diameter of boring is 5cm, can also use other size drill bits certainly, and the water on the floor gets into floor inside through said boring like this, makes floor drenched.As shown in Figure 4, on every floor plate, offer skylight 6, to reduce the airborne dust that cross-ventilation causes, reduce the surge pressure that the air compression forms; The Dust Capacity that dashes because of the air compressional wave when reducing blasting body and landing and produce during ground, if skylight 6 is positioned at said pond, 6 edges need be provided with the cofferdam in the skylight; Avoid the water in the pond to flow away, the through hole that so-called skylight 6 promptly is provided with on floor, skylight 6 is of a size of: long 1.5m; Wide 1.5m, skylight 6 can also be set to circle or ellipse, and skylight 6 is positioned at the middle part of each span of floor; The quantity in skylight 6 is according to the area decision of floor, and the area of floor is big, just needs to be provided with skylight 6 naturally more.To the explosion thing of the estimating dust that regional water pipe drenches, drenches and produce when member contacts to earth to reduce that collapses.As shown in Figure 5, the plastics water receptacles 7 of per 4-5 square metres of suspension 5 kg in each floor, and emulsion 8 is set wraps in the water receptacle 7, emulsion 8 bag doses are 20g, form a lot of water under high pressure curtains and high energy water smoke like this after the explosion to adsorb dust.

This method does not need to build huge handling frame again; In wanting the building of explosion, just can operate; Utilize this method in the demolition blasting process, not only to make dust reduce by 80%, and practiced thrift the protection expense, this method also has positive effect to the harm control of slungshot, noise, shock wave.

Claims

1. the dust-control method of a demolition blasting building is characterized in that comprising following operating procedure:

(1), cover shot hole (2), water bag (3) covers the zone radius of shot hole (2) greater than 30 cm with water bag (3);

(4), offer skylight (6) at the middle part of each each span of floor face;

(6), in each floor the plastics water receptacles (7) of per 4-5 square metres of suspension 5 kg, and in this plastics water receptacle, be provided with explosive (8).

2. the dust-control method of a kind of demolition blasting building according to claim 1 is characterized in that: said skylight (6) through hole for being provided with on the floor, skylight (6) are of a size of: long 1.5m, wide 1.5m.