CN1101505C - Sludge extruding method by explosion under dike - Google Patents

Abstract

The present invention relates to a sludge extruding method by explosion under dams, which is characterized in that firstly, at least one engineering plastic pipe is paved on the surfaces of foundations of buildings and underwater sludge or is paved in the mud; a water riprapping process is carried out, bar-shaped explosive packages are filled into the engineering plastic pipe then, explosion under dams is implemented to extrude sludge under riprapping bodies, and the riprapping bodies fall on lower soil layers for extruding sludge. Compared with other explosion methods, the sludge extruding method by explosion under dams saves the amount of explosive, reduces the cost of using explosion methods to treat soft soil foundations and can shorten construction periods.

Description

Sludge extruding method by explosion under dike

Technical field

The present invention relates to the method for treatment of soft foundation under water.Be applicable to hydraulic structure basis treatments of soft foundation such as harbour bedding, structure base, slideway, rib body, mole, cofferdam.Specially refer to the soft basic sludge extruding method by explosion under dike in submerged structure basis.

Background technology

Build structure base on the silt soft base under water, job practices commonly used is 1. mechanical desilting, dredges earlier to form jackstone foundation trench waterborne, and fill block stone throwing waterborne forms the basic section of engineering design.It is big that this method exists desilting side's amount, need with heavy mechanical equipments such as dredge boats, and desilting cost height, the construction period is long.2. quick-fried rammer squeeze to become silted up, and does not dredge, and behind the jackstone waterborne, arranges group's cartridge bag at the stone riprap end face, and stone riprap is sunk, and the mud of stone riprap bottom is squeezed open, and reaches the purpose of desilting.It is big that this method consumes explosive charge, and squeeze the silt depth that becomes silted up and have only 2-3 rice.Sludge extruding method by explosion under dike is an embedding in advance engineering plastics pipe on the mud face under water, water throwing stone is to certain thickness then, blast with linear charges is placed into the bottom of stone riprap along plastic pipe, forms the blast cavity, stone riprap is fallen on the hardpan in the blast of the bottom of stone riprap.The construction of explosion under dike method is simple than conventional method, has formed complete construction technology and the job practices of a cover.

Summary of the invention

The method that the objective of the invention is to adopt explosion under dike to squeeze silt is handled the sludge soft ground, does not need large-scale desilting equipment, can utilize explosion energy more fully, thereby reduces cost.

The present invention is directed to the problem that prior art exists, adopted explosion under dike to handle the method for soft foundation under water,, made full use of explosion energy, therefore be called as sludge extruding method by explosion under dike at the bottom of stone riprap charging explosion.

The technology used in the present invention solution is as follows: at first lay the engineering plastics pipe more than one or in the surface of place, the basis of structure, underwater sludge or mud, carry out water throwing stone then, again blast with linear charges is packed in the engineering plastics pipe, implement explosion under dike, squeeze the mud under the stone riprap, stone riprap drops down onto on the hardpan of bottom, reaches to squeeze the purpose of becoming silted up; Wherein the length of the engineering plastics pipe of laying in the surface of place, the basis of structure, underwater sludge or mud is greater than the length of structure base; There is a rope centre of described plastic pipe, and the two ends of engineering plastics is exposed at the two ends of this rope respectively; The method of engineering plastics pipe of wherein blast with linear charges being packed into is: affixed with rope and blast with linear charges that engineering plastics pipe one end exposes, draw the rope of the engineering plastics pipe other end, and blast with linear charges is introduced appropriate location in the engineering plastics pipe; The optimum thickness of stone riprap is 1.67 times a silt depth; The dose that stone riprap is felt at ease fully is: $q\≥K{\mathrm{\ρ}}_m{L}_r^3/(H_r-0.30\frac{H_r^3}{H_m})$ Wherein q-is the unit length dose, ρ _m-be mud density, H _r-be the thickness of stone riprap, L _r-be the width of stone riprap, H _m-be silt depth, K-is an experimental constant; The compacting mud by explosion effect is: $\frac{\mathrm{\ΔS}}{H_m}=K^{\′}\frac{q{H}_r}{{\mathrm{\ρ}}_m{H}_m{L}_r^2}\frac{H_m-k_1{H}_r}{H_m}$ Wherein q-is the unit length dose, ρ _m-be mud density, H _r-be the thickness of stone riprap, L _r-be the width of stone riprap, H _m-be silt depth, Δ s-is blast back stone riprap end of a year or month width, K ', k ₁-be experimental constant.

Description of drawings

For further specifying feature of the present invention and effect, below enumerate embodiment now and in conjunction with the accompanying drawings the present invention is described in detail as follows, wherein:

Fig. 1 be before the present invention is exploded cartridge bag and jackstone concern the position profile.

Fig. 2 is the schematic diagram of engineering plastics pipe and middle rope among the present invention.

The specific embodiment

At first see also Fig. 1 and Fig. 2, in construction, along structure base axis arranged one or more engineering plastics pipe 14, arrange the quantity of engineering plastics pipe 14, decide on the foundation width of structure, simultaneously also relevant with the diameter of engineering plastics pipe 14, just, if structure is basic narrow, such as, breakwater etc., then the quantity of the engineering plastics pipe 14 of Bu Zhiing is also just fewer; If the basis of structure is than broad, such as, harbour bedding etc., then the quantity of the engineering plastics pipe 14 of Bu Zhiing is also just more relatively, and the engineering plastics pipe of the arranging 14 suitable distance of should being separated by.After engineering plastics pipe 14 arranges, carry out jackstone waterborne, just throw in the water inlet with boat-carrying piece stone, throwing is on the engineering plastics pipe 14 of being scheduled to structure base and arranging in advance, when throwing is rockfilled after body 12 reaches engineering height and certain drilling depth, blast with linear charges 15 is encased in the engineering plastics pipe 14 that arranges in advance (as shown in Figure 1) again, implement blast, soft foundation mud 13 under the stone riprap 12 is extruded, stone riprap 12 falls at this moment, stone riprap 12 falls on the hardpan 16, has reached the purpose of crowded silt.The above-described length that is arranged in the length of the engineering plastics pipe 14 under the structure base greater than structure base in advance, if, when structure base is very long, then need segmentation to carry out compacting mud by explosion, engineering plastics pipe 14 length that be arranged in advance under the structure base this moment should be greater than the length of stone riprap after the segmentation 12, wherein, in the circular hole of engineering plastics pipe 14, place a rope 21 (as shown in Figure 2) in advance, the length of the rope 21 that places should be greater than the length of engineering plastics pipe 14, and the two ends of engineering plastics pipe 14 is all exposed at its two ends.If during segment processing structure basic, the pipe range of every section engineering plastics pipe 14 should be greater than 50 meters, otherwise to giving powder charge inconvenience in the engineering plastics pipe 14.The method of wherein said powder charge in engineering plastics pipe 14 is: earlier that an end of end of blast with linear charges 15 and the rope 21 in the engineering plastics pipe 14 is affixed, draw the rope 21 of engineering plastics pipe 14 other ends, with the appropriate location in the blast with linear charges 15 introducing engineering plastics pipes 14, primer 15 is extruded the soft foundation mud 13 under the stone riprap 12.

The optimum thickness of the stone riprap 12 described in the sludge extruding method by explosion under dike of the present invention is the thickness of 1.67 times mud 13; The dose of the described blast with linear charges of adorning in engineering plastics pipe 14 15 calculates according to following formula, $q\≥K{\mathrm{\ρ}}_m{L}_r^3/(H_r-0.30\frac{H_r^3}{H_m})$ In the formula: q is the unit length dose, ρ _mBe mud density, H _rBe stone riprap thickness, L _rBe the stone riprap width, K is an experimental constant.

By above formula as can be seen, when stone riprap 12 wide more, when the density of mud is big more, required dose is also just many relatively more, at required dose more for a long time, article one, when engineering plastics pipe 14 can not load required dose, can arrange two or many engineering plastics pipes 14 in advance in the desired position, also can adopt the method for the diameter that strengthens engineering plastics pipe 14 to solve the problem of powder charge.

The effect of sludge extruding method by explosion under dike soft soil foundation mud 13 of the present invention is: $\frac{\mathrm{\ΔS}}{H_m}=K^{\′}\frac{q{H}_r}{{\mathrm{\ρ}}_m{H}_m{L}_r^2}\frac{H_m-k_1{H}_r}{H_m}$ Q is the unit length dose in the formula, ρ _mBe mud density, H _rBe the thickness of stone riprap, L _rBe the width of stone riprap, H _mBe silt depth, AS is blast back stone riprap end of a year or month width.

The blast row who adopts in the present invention and the present construction method of rockfilling of becoming silted up is compared, because of having adopted the method for explosion under dike, made full use of the energy of explosive, cancelled ship machine powder charge operation, reduced the cost of the soft base of explosive treatment, because of charge process and the key issues such as dose and crowded silt effect that solved this method, make the present invention have advantages such as the low and construction period of construction costs cost is short.

Claims (7)

1, a kind of sludge extruding method by explosion under dike, it is characterized in that, at first in the surface of place, the basis of structure, underwater sludge or mud, lay the engineering plastics pipe more than one or, carry out water throwing stone then, again blast with linear charges is packed in the engineering plastics pipe, implement explosion under dike, squeeze the mud under the stone riprap, stone riprap drops down onto on the hardpan of bottom, reaches to squeeze the purpose of becoming silted up.

2, a kind of sludge extruding method by explosion under dike according to claim 1 is characterized in that, wherein the length of the engineering plastics of laying in the surface of place, the basis of structure, underwater sludge or mud is greater than the length of structure base.

3, according to claim 1,2 described a kind of sludge extruding method by explosion under dike, it is characterized in that there is a rope centre of described plastic pipe, the two ends of engineering plastics is exposed at the two ends of this rope respectively.

4, sludge extruding method by explosion under dike according to claim 1, it is characterized in that, the method of engineering plastics pipe of wherein blast with linear charges being packed into is: affixed with rope and blast with linear charges that engineering plastics pipe one end exposes, draw the rope of the engineering plastics pipe other end, blast with linear charges is introduced appropriate location in the engineering plastics pipe.

5, a kind of sludge extruding method by explosion under dike according to claim 1 is characterized in that, the optimum thickness of stone riprap is 1.67 times a silt depth.

6, a kind of sludge extruding method by explosion under dike according to claim 1 is characterized in that, the dose that stone riprap is felt at ease fully is: $q\≥K{\mathrm{\ρ}}_m{L}_r^3/(H_r-0.30\frac{H_r^3}{H_m})$ Wherein q-is the unit length dose, ρ _m-be mud density, H _r-be the thickness of stone riprap, L _r-be the width of stone riprap, H _m-be silt depth, K-is an experimental constant.

7, a kind of sludge extruding method by explosion under dike according to claim 1 is characterized in that, the compacting mud by explosion effect is: $\frac{\mathrm{\ΔS}}{H_m}=K^{\′}\frac{q{H}_r}{{\mathrm{\ρ}}_m{H}_m{L}_r^2}\frac{H_m-k_1{H}_r}{H_m}$ Wherein q-is the unit length dose, ρ _m-be mud density, H _r-be the thickness of stone riprap, L _r-be the width of stone riprap, H _m-be silt depth, Δ S-is blast back stone riprap end of a year or month width, K ', k ₁-be experimental constant.