CN106400785A - Construction method for grouting by adopting highly spraying, drilling and grouting integrated machine - Google Patents

Abstract

The invention discloses a construction method for grouting by adopting a highly spraying, drilling and grouting integrated machine. The construction method comprises the following steps: arranging a check ball valve at a spraying nozzle of the highly spraying, drilling and grouting integrated machine; performing drilling operation by adopting the highly spraying, drilling and grouting integrated machine, wherein a high-pressure medium which is used in a drilling process comprises the following components in parts by weight: 75 parts of cement, 45 parts of bentonite, 180 parts of clay, 6 parts of water glass and 300 parts of water; after drilling is completed, performing grouting operation directly, and simultaneously, adding 6 to 9 parts of a cement accelerating agent from the opening of a hole. The construction method has the beneficial effects that the problems of blockage of the spraying nozzle caused by the fact that fine grains in the hole fall back to the spraying nozzle because of blowing-out in a process of connecting a long drilling rod to a drilled hole and serious water leakage in the hole in the drilling process can be solved; meanwhile, the disturbance to a stratum caused by the fact that the spraying, drilling and grouting integrated machine takes air and slurry as drilling media avoided by taking the measures of the check ball valve, the drilling aperture is reduced, the drilling efficiency is improved, and the cost for treating drilling slag and protecting a wall of the drilled hole is reduced.

Description

A kind of being bored using high spray fills the construction method that all-in-one is in the milk

Technical field

The present invention relates to plasma pouring constructing skill field, it particularly relates to one kind bores filling all-in-one using high spray filled The construction method of slurry.

Background technology

The high integrated High-Injection Technique principle of brill filling of spraying is identical with conventional High-Injection Technique principle, but height sprays brill and fills All-in-one has carried out larger innovation and has improved to construction equipment, and high spray is bored and filled that all-in-one complete set of equipments melts boring and high pressure jet grouting is Integrally, water, gas, slurry high-pressure injection pipeline are installed in drilling rod, are equipped with conveying water, gas, slurry and corresponding lifting means, spray will be bored The hydraulic walking chassis movement of one, to bore position, carries out drilling construction using the drill bit with spray-hole, during drilling, high Mudjack conveying high-pressure rinses liquid medium, opens air compressor machine conveying high-pressure gas, high pressure rinse medium and gases at high pressure auxiliary drill Head completes formation cut, and meanwhile, high-pressure medium plays borehole cleaning, forms laitance coating Gu Bi and cooling drill bit effect.After the completion of boring, Do not need to carry brill, can directly carry out high spray operation, and by adjusting different modules, to realize different high pressure jet grouting techniques, Churning, fixed spray, pendulum pressure spray process can be selected by design requirement, so that boring and high pressure jet grouting operation are uninterrupted and continuous in good time Complete.

The original design antiseepage of Ganjiang River Jin Tandi adopt sand shooting process Seepage after the completion of, 18 to 25 March in 2016 Jiangxi Rise to 46m elevation in river position, the pressure tap observation of arrangement after main dike finds：Pressure-measuring pipe Gan Jiangshui outer with dike after main dike dike Position variation relation is very close, and main dike levee foundation lower gravel layer and silty sand ground basis water penetration are relatively by force thus it is speculated that produce after main dike Bubble spring, diving seepage and there is stronger relatedness with main dike foundation seepage, for this reason, owner's organization design, management, construction four Side's research determines to take high pressure jet grouting reinforcement to this main dike basis jetting curtain wall.High pressure jet grouting is arranged in original design jetting wall and meets water Surface side, away from jetting wall axial line control in 45cm, is effectively connected with jetting wall with ensureing that height sprays wall.For meeting emergency work construction intensity need Ask, jetting wall reinforcement is constructed using boring filling all-in-one, but in work progress, find high spray all-in-one in gravel layer and silty sand ground There are 4 aspects, have a strong impact on construction speed.

1st, Ganjiang River main dike basis silty sand ground and gravel foundation water penetration are strong, and in boring procedure, gravel foundation dehydration is serious, plus Upper gravel layer hole wall collapse, easily produces bit freezing phenomenon；

2nd, during high spray all-in-one boring, because take wind and water combined carry out soil body cutting and rush scouring water as cooling, cause When adjacent pitch of holes reaches 1.4m, grout leaking, phenomenon of collaborating occur；Local topography, when pitch of holes reaches 2.8m, still has string leakage phenomenon, says Bright high spray all-in-one boring procedure is larger to basic disturbance；

3rd, high spray is bored and is filled all-in-one using water, gas mixture as bore flushing, cooling liquid, during drilling rod spreading, because of spray Mouth position is low, and hole bottom slurry sand grains content is big, after nozzle rests in sludge settling, easily causes spray nozzle clogging, serious shadow Ring boring and sprinkling irrigation operation normally runs；

4th, after high spray brill filling all-in-one drills into dehydration stratum, hole leakage water seriously causes precipitation to fall after rise after holding one's breath Around drill bit, repeatedly cause in the hole underground drilling accident, affect construction speed.

Content of the invention

It is an object of the invention to proposing a kind of boring using high spray to fill the construction method that all-in-one is in the milk, can solve the problem that Because the in the hole particulate that blowing-out leads to falls the blocking to nozzle, nozzle being caused after rise and holes during boring extension drill rod The serious problem of Cheng Zhongkong internal hemorrhage due to trauma dehydration.

For realizing above-mentioned technical purpose, the technical scheme is that and be achieved in that：

A kind of being bored using high spray fills the construction method that all-in-one is in the milk, and comprises the following steps：

1) bore to fill in high spray and check ball valve is set at the nozzle of all-in-one；

2) filling all-in-one is bored using high spray and carry out bore operation, the leak stopping material using in the leak stopping of dehydration location in boring procedure Material includes the component of following parts by weight：

75 parts of cement, 45 parts of bentonite, 180 parts of clay powder, 6 parts of waterglass and 300 parts of water；

3) after the completion of holing, directly carry out cementing operations, add the cement hardener of 6-9 part simultaneously from aperture.

Further, step 2) the middle supply air line closing high spray brill filling all-in-one.

Beneficial effects of the present invention：Propose first and take " high specific gravity, low viscosity, quick setting, low-intensity " slurry strengthened wall Construction principle, high specific gravity mud reached and carried particle outlet, reduces the purpose of in the hole precipitation；Low viscosity, quick setting mud Define relatively thin mud skin " sealing ring " in hole wall periphery；High spray process is made to have quickly completed broken shell cutting it is ensured that whitewashing reaches To larger range of scatter；By boring to fill in high spray, at one machine nozzle, non-return valve is set, connects during solving boring work Because the in the hole particulate that blowing-out leads to falls the problem to nozzle, nozzle being resulted in blockage after rise during long drill pipe, avoid brill filling one simultaneously Body machine is used wind and mud as the disturbance to stratum for the medium of holing, reduces boring aperture, improves drilling efficiency, reduces Boring mud process and the cost of borehole wall-protection.

Specific embodiment

Below the embodiment it is clear that described is clearly and completely described to the technical scheme in the embodiment of the present invention It is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the common skill in this area The every other embodiment that art personnel are obtained, broadly falls into the scope of protection of the invention.

Being included using the construction method that high spray brill filling all-in-one is in the milk according to embodiments of the invention is following Step：

1) bore to fill in high spray and non-return valve is set at the nozzle of all-in-one；

In real work, when only taking water (mud) as flushing liquor working condition, a ball is installed on nozzle , as flap type inverse-stopping type valve, in protection mud, fine grained is in boring procedure for the little steel ball of shape and bomb with steel balls errant and storage warehouse In can not enter in nozzle；The whitewashing stage, under water, the impact of gas mixed liquor, steel ball is flicked entrance steel ball storage from jet expansion Storage, and open jet expansion in the presence of water, gas mixed liquor, thus ensureing that nozzle can operation in normal state.

Take wind, water (mud) as during bore flushing operation if necessary, nozzle protecting device is made as " sleeve valve type " Stop valve type structure, reaches the purpose of non-return valve on nozzle pore using rubber case, that is, when drilling rod spreading airduct is closed, valve Set stops sand grains in mud from entering in nozzle pore, after recovering supply, can easily guarantee quickly to open, protect drilling rod connecting Do not block during bar.

At nozzle setting non-return valve solve boring extension drill rod during because the in the hole particulate that blowing-out leads to fall after rise to The blockage problem at nozzle, nozzle being caused, it is ensured that all-in-one is holed to bottom hole, can smoothly proceed to injection from bottom to top and make Industry operation, it is ensured that technique linking is in order and time-consuming short, improves work efficiency；

2) filling all-in-one is bored using high spray and carry out bore operation, stifled in dehydration serious location leak stopping use in boring procedure Leakage material includes following components：

Cement 75kg, bentonite 45kg, clay powder 180kg, waterglass 6kg and water 300kg.

The loss circulation material of above-mentioned preparation make use of the low feature of clay slip cured strength, combines swollen not only but also combines swollen , in the expanded feature in hydration process so that simulated mud in the case of same cement-water ratio, concentration of hydraulic mixture of the present invention is relatively for profit soil Greatly, it is easy to close to gravel hole after addition solidification coagulant, thus the closure quickly solving gravel dehydration stratum is asked Topic.In addition, the mud low intensity of above-mentioned preparation, it is easy to broken shell when spraying.

3) after the completion of holing, directly carry out cementing operations, add 6-9kg cement hardener from aperture simultaneously；

Add cement hardener in filling process, thus accelerating the rate of set of high spray pile body, reducing and spraying In journey, grout leaking, phenomenon of collaborating in adjacent holes, and the course of injection that prevents from being in the milk is to the disturbance in adjacent earth formations and hole of having sprayed it is ensured that height The seriality of spray body of wall.

Step 2 in above-mentioned construction method) in, constructor can close high spray and bore the feeder filling all-in-one, boring Nozzle is carried out as flushing liquor only with high-pressure medium during hole.Above-mentioned cleaning way not only can effectively reduce Boring aperture, reduces the disturbance to stratum for the boring procedure, and can improve the speed of boring.

The principle of the present invention：

High spray is bored and is filled all-in-one in drilling rod connecting growth process, need to cut off the water (mud), blowing-out completes stacks operation, blowing-out, Cut off the water after (mud), in the hole precipitation quickly falls after rise to bottom hole position, cause silt content in hole bottom slurry big, because of water delivery (slurry) pipe Mouth and nozzle are now in foot of hole, and silt particle easily enters the mouth of pipe and nozzle results in blockage.Take increasing in the hole concentration of hydraulic mixture, Make mud have larger uplift pressure make flour sand fine grained with mud tap hole outside, boring water delivery (slurry) mouth of pipe at formed flow Pulp layer, after water delivery (slurry) recovers normal conveying, the fluid inside and outside drilling rod can insertion rapidly；But the mud at nozzle is contained within carefully After little particle, easily cause spray nozzle clogging.Accordingly, it would be desirable to shape nozzle taken with protective measure or nozzle is fabricated to non-return valve Formula is it is ensured that in water in pipe, gas mixing physical ability access aperture, the technological parameter reaching high pressure jet grouting requires, and meanwhile, meets in the hole serosity In fine particle must not enter the purpose in nozzle.

In gravel strong dehydration earth-boring, both required slurry coat method have coagulate soon, high colloidity and the little spy of diffusance Property, it is easy to the closure of gravel formation pore；Require to be formed on hole wall again mudcake thickness is less, intensity is relatively low, be easy to height and spray During work broken shell cutting, its broken shell resistance does not affect high spray cut radius it is ensured that grout mixing meets technological parameter requirement.Separately Outward, high spray is bored when filling all-in-one drilling construction it is impossible to take the conventional in the hole backfill clay of other bore modes, fill concrete And the method for the inert material such as cement injection mortar closure processes dehydration stratum, need Study of Liquid shape cream slurry, coagulate underflow soon, prevent Serosity, in boring, runs off too fast, causes in the hole precipitation to fall the generation of burying after dehydration after rise.

The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention Within god and principle, any modification, equivalent substitution and improvement made etc., should be included within the scope of the present invention.

Claims (2)

1. a kind of construction method being in the milk using high spray brill filling all-in-one is it is characterised in that comprise the following steps：

1) bore to fill in high spray and check ball valve is set at the nozzle of all-in-one；

2) filling all-in-one is bored using high spray and carry out bore operation, the loss circulation material bag using in the leak stopping of dehydration location in boring procedure Include the component of following parts by weight：

75 parts of cement, 45 parts of bentonite, 180 parts of clay powder, 6 parts of waterglass and 300 parts of water；

3) after the completion of holing, directly carry out cementing operations, add the cement hardener of 6-9 part simultaneously from aperture.

2. according to claim 1 being bored using high spray fills the construction method that all-in-one is in the milk it is characterised in that step 2) close high spray in and bore the supply air line filling all-in-one.