CN1070969C - 'Core covering' section embankment explosion method construction technology - Google Patents

Abstract

The present invention relates to a construction technology of core covering sections by a seawall explosion method, which is characterized in that: firstly, mixed stone materials for filling and cutting mountains on land are adopted; when a filling seawall body reaches the height designed by a project and a certain size, explosives are arranged on the boundary of mudstone on both sides of a seawall head and the seawall body, and are detonated to form a seawall explosion method of a core covering section on filling mixed soil layers on both sides of the seawall head and the seawall body. The present invention can be widely applied to the soft foundation treatment of the projects of breakwaters, revetments, cofferdams, etc. in port engineering. The present invention has the advantages of low project cost, good project quality, etc.

Description

" Bao Xin " section sea wall explosion method construction technology

The present invention relates in the port works that the section of hydrotechnical construction is chosen and the method for Soft Ground under water.Be applicable to engineering treatment of soft foundation such as mole, shore protection and cofferdam, be meant " Bao Xin " section sea wall explosion method construction technology especially.

On soft foundation, build mole, shore protection and cofferdam, form of fracture commonly used is real core dike, soft base processing method, its method is divided into two kinds: 1. mechanical desilting, with dredge boat soft subgrade soil layers such as mud are removed earlier, form the jackstone foundation trench, jackstone waterborne and land jackstone combine, and form the real core dike of the design section in mole, shore protection and cofferdam etc.; 2. the become silted up method desilting of rockfilling of blast row is embedding group's cartridge bag in the mud of jackstone dike head forward position, and the blast desilting is finished simultaneously with rockfilling.In the mud of dike both sides, bury group cartridge bag again, basically form the real core dike section of design after the explosive treatment.These two kinds of methods that adopt in the engineering exist following shortcoming at present: the desilting of 1. dredging, be subjected to the influence of soft basic stable side slope, the desilting area is big, need dredge navigation channel and jackstone operation waterborne, will be with the main equipment and the folk prescription cost height of dredging, shortcoming such as engineering posterior settlements such as the mole of building, shore protection and cofferdam are big.2. the blast row silt method of rockfilling requires to handle hardpan, pore-forming powder charge cost height when handling the jackstone dike heart.3. two kinds of methods all are to have adopted the form of real core dike, and the jackstone amount that needs is big, whole construction costs height.

The purpose of this invention is to provide a kind of " Bao Xin " section sea wall explosion method construction technology, it can form mole, shore protection and the cofferdam of " Bao Xin " section, mole, shore protection and cofferdam after building can be maintained a long-term stability, reduce construction link simultaneously, reduce construction costs greatly.The present invention is directed to the shortcoming that prior art exists, proposed the explosion method construction technology of " Bao Xin " section sea wall, promptly, made sea wall both sides toes such as mole, shore protection and cofferdam have certain width to drop down onto on the hardpan with the method for blast, and the dike heart is not felt at ease, middle parcel one mud bag.

The technical solution that the present invention adopts is as follows: at first adopt land throwing to fill out mountain mixing building stones at the construction initiating terminal, the dike head can not carry out soft basic explosive treatment or carry out part blast desilting and handle, when carrying out part blast desilting processing, when throwing is filled out body and is reached engineering design and throw raising journey and drilling depth Δ S, fill out body forward position mudstone intersection in throwing and throw in group's cartridge bag (when silt depth is thicker, group's cartridge bag is embedded in the mud), the group is after cartridge bag detonates, and makes that the interface drops down onto the degree of depth certain in the mud under the stone riprap; Repeat above-mentioned steps, the dike heart constantly advances forward, forms a levee body of not feeling at ease.When jackstone dike head is advanced to certain-length Δ L, embedding group's cartridge bag in the mud of the both sides of dike, the levee body both sides are dropped down onto on the hardpan, thereby the mud of dike heart bottom certain width is wrapped in the middle of stone riprap and the hardpan, formed the form of fracture of " Bao Xin " dike; The end of a year or month width of both sides, the angle of fall, described sea wall slope is a 5-10 rice; The embedding point of side direction cartridge bag is to the distance L on jackstone levee slope top _yShould equal the thickness H of 1.5-1.8 times of stone riprap _RCartridge bag buried depth W _eShould equal the thickness H of 0.55-0.65 mud doubly _sThe unit length dose q (kilogram/rice) of charge collocation should equal 15-25 kilogram/rice; The dike head need carry out part explosive treatment soft when base, and cartridge bag should be placed muck surface and falling rocks intersection, just cartridge bag to the levee slope apex distance from S _yShould equal the thickness H of 0.9-1.1 times of stone riprap _RIn the time of in the mud that group's cartridge bag is embedded into the mudstone intersection, cartridge bag to the levee slope apex distance from S _yShould equal the thickness H of 1.5-2.0 times of stone riprap _RCartridge bag buried depth W _eShould equal the thickness H of 0.3-0.4 mud doubly _sThe unit length dose q (kilogram/rice) of described charge collocation should satisfy following relation: $\frac{q}{H_m\mathrm{\ΔS}}=0.3~0.4$ (Δ S is filled into dipstick metering, H for throwing in the formula _mBe silt depth); The soft basic thickness of handling when needs such as mud are during greater than 10 meters, and the explosive treatment of dike both sides is: stone riprap is thrown when filling out engineering design elevation and certain-length Δ L, embedding group's cartridge bag in the mud of stone riprap both sides then, cartridge bag to the levee slope apex distance from L _yShould equal the thickness H of 1.6-2.0 times of stone riprap _RCartridge bag buried depth W _eShould equal the thickness H of 0.55-0.65 mud doubly _sThe unit length dose q (kilogram/rice) of charge collocation should equal 25-40 kilogram/rice.

For feature of the present invention and effect are described, also the present invention is further illustrated in conjunction with the accompanying drawings below to enumerate embodiment, wherein:

Fig. 1 is " Bao Xin " sea wall profile after the explosive treatment of the present invention.

Fig. 2 is that " Bao Xin " sea wall section side direction was buried the medicine drawing of site before the present invention was exploded.

Fig. 3 is that the present invention " Bao Xin " sea wall part explosive treatment dike head buries the medicine drawing of site.

Below in conjunction with accompanying drawing the present invention is introduced in detail.At first see also Fig. 1, Fig. 2 and Fig. 3, at first adopt land throwing to fill out mountain mixing building stones in the present embodiment, when throwing is filled out levee body and is reached engineering design elevation and certain drilling depth, can not carry out dike head explosive treatment at bottom silt thickness under less than 10 meters situation, only carry out levee body both sides explosive treatment, stone riprap 12 is thrown when filling out engineering design elevation and certain-length Δ L (Δ L is that the distance that advances the dike head is arrived on the bank), quick-fried preceding throwing that forms in the accompanying drawing 3 filled out line 31, embedding group's cartridge bag 21 (as shown in Figure 2) in the mud 11 of the mudstone intersection of stone riprap 12 both sides then, and ignition group cartridge bag 12, make soft foundation mud 11 outer moving after the blast, make dike both sides toe that certain end of a year or month width be arranged, the mixing building stones that the both sides of body section are filled out in throwing fall, drop down onto on the hardpan, be formed centrally a mud bag at dike, constitute " Bao Xin " section sea wall (as shown in Figure 1).The dike both sides toe of described formation " Bao Xin " section sea wall drops down onto on the hardpan, and end of a year or month width is 6～10 meters.Cartridge bag 21 to the levee slope apex distance from L _yShould equal the thickness H of 1.5-1.8 times of stone riprap 12 _R Cartridge bag 21 buried depth W _e(W _eBe the distance of muck surface to cartridge bag) should equal the thickness H of 0.55-0.65 mud 11 doubly _sThe unit length dose q (kilogram/rice) of charge collocation should equal 15-25 kilogram/rice.

The soft foundation silt depths of handling when needs such as mud need carry out dike head part blast desilting and handle during greater than 10 meters in dike head progradation.Stone riprap 12 is thrown when filling out engineering design elevation and certain drilling depth Δ S (Δ S is filled into dipstick metering for throwing), forms to throw before the blast in the accompanying drawing to fill out line 31 (as shown in Figure 3), throws in group's cartridge bag 32 then near jackstone dike head mudstone intersection, cartridge bag 32 to the levee slope apex distance from S _yShould equal the thickness H of 0.9-1.1 times of stone riprap 12 _RWhen needs are embedded into group's cartridge bag 33 in the mud 11, cartridge bag 33 to the levee slope apex distance from S _yShould equal the thickness H of 1.5-2.0 times of stone riprap 12 _RCartridge bag 33 buried depth W _eShould equal the thickness H of 0.3-0.4 mud 11 doubly _sThe unit length dose q (kilogram/rice) of charge collocation should satisfy following relation: $\frac{q}{H_m\mathrm{\ΔS}}=0.3~0.4$ (Δ S is filled into dipstick metering, H for throwing in the formula _mBe mud 11 thickness).

The soft basic thickness of handling when needs such as mud are during greater than 10 meters, the explosive treatment of dike both sides is: stone riprap is thrown when filling out engineering design elevation and certain-length Δ L, quick-fried preceding throwing that forms in the accompanying drawing filled out line 31 (as shown in Figure 3), embedding group cartridge bag 21 (as shown in Figure 2) in the mud 11 of jackstone dike both sides then, cartridge bag 21 to the levee slope apex distance from L _yShould equal the thickness H of 1.6-2.0 times of stone riprap 12 _R Cartridge bag 21 buried depth W _eShould equal the thickness H of 0.55-0.65 mud 11 doubly _sUnit dose q (kilogram/rice) of charge collocation should equal 25-40 kilogram/rice.

Utilize the present invention " Bao Xin " section sea wall explosion method construction technology, behind the formation sea wall, throw some jackstones 15 at the face of heading sea of sea wall again, jackstone 15 links to each other with stone riprap 12.Jackstone 15 below seawater 16 surfaces, plays the effect of reinforcing stone riprap 12 on the surface of bottom silt 11.

The Dredging that adopts in the present invention and the present construction is compared with the complete dredging method of blast, because adopting " cored " section sea wall explosion method construction, both guaranteed stability of foundation, make again construction costs greatly Reduce (in " cored " section test embankment, reduce jackstone amount 30%, reduce construction costs 18%), The soft base of dike head is not processed or section processes, has simplified construction technology, has reduced construction volume.

Claims (5)

1, a kind of bag core section sea wall explosion method construction technology earlier adopts land throwing to fill out mountain mixings building stones at the construction initiating terminal, and fill out levee body when throwing and reach the engineering design elevation and necessarily during drilling depth, it is characterized in that,

If the thickness of bottom silt is during less than 10 meters, the dike head can not carry out explosive treatment, if the thickness of bottom silt is during greater than 10 meters, carry out the part explosive treatment, fill out in the mud that body dike head mudstone has a common boundary or the embedding group of muck surface cartridge bag in throwing, and ignite group's cartridge bag, dike heart part jackstone does not require to be fallen on the hardpan; And in the levee body both sides, when emphasis carries out explosive treatment, fill out in the mud of body section mudstone intersection or the embedding group of muck surface cartridge bag in throwing, and ignite group's cartridge bag, and soft foundation mud is moved outward, make dike both sides toe that certain end of a year or month width be arranged, the mixing building stones that the both sides of body section are filled out in throwing fall, drop down onto on the hardpan, be formed centrally a mud bag, constitute bag core section sea wall at dike.

2, bag core section sea wall explosion method construction technology according to claim 1 is characterized in that the dike both sides toe of described formation bag core section sea wall drops down onto on the hardpan, and end of a year or month width is 6～10 meters, constitutes bag core section sea wall.

3, bag core section sea wall explosion method construction technology according to claim 1 and 2 is characterized in that, the embedding point of side direction cartridge bag is to the distance L on jackstone levee slope top _yShould equal the thickness H of 1.5-1.8 times of stone riprap _RCartridge bag buried depth W _eShould equal the thickness H of 0.55-0.65 mud doubly _sThe unit length dose q of charge collocation should equal 15-25 kilogram/rice.

4, " Bao Xin " according to claim 1 section sea wall explosion method construction technology is characterized in that, the dike head need carry out part explosive treatment soft when base, and cartridge bag should be placed muck surface and falling rocks intersection, just cartridge bag to the levee slope apex distance from S _yShould equal the thickness H of 0.9-1.1 times of stone riprap _RIn the time of in the mud that group's cartridge bag is embedded into the mudstone intersection, cartridge bag to the levee slope apex distance from S _yShould equal the thickness H of 1.5-2.0 times of stone riprap _RCartridge bag buried depth W _eShould equal the thickness H of 0.3-0.4 mud doubly _sThe unit length dose q of described charge collocation should satisfy following relation: $\frac{q}{H_m\mathrm{\ΔS}}=0.3~0.4$

Δ S is filled into dipstick metering, H for throwing in the formula _mBe silt depth

5, " Bao Xin " according to claim 1 and 2 section sea wall explosion method construction technology, it is characterized in that, the soft basic thickness of handling when needs such as mud are during greater than 10 meters, the explosive treatment of dike both sides is: stone riprap is thrown when filling out engineering design elevation and certain-length Δ L, embedding group cartridge bag in the mud of stone riprap both sides then, cartridge bag to the levee slope apex distance from L _yShould equal the thickness H of 1.6-2.0 times of stone riprap _RCartridge bag buried depth W _eShould equal the thickness H of 0.55-0.65 mud doubly _sThe unit length dose q of charge collocation should equal 25-40 kilogram/rice.

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