CN106087994A - A kind of high pressure jet grouting pore-forming dado structure and construction method thereof - Google Patents

A kind of high pressure jet grouting pore-forming dado structure and construction method thereof Download PDF

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Publication number
CN106087994A
CN106087994A CN201610719244.4A CN201610719244A CN106087994A CN 106087994 A CN106087994 A CN 106087994A CN 201610719244 A CN201610719244 A CN 201610719244A CN 106087994 A CN106087994 A CN 106087994A
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CN
China
Prior art keywords
hole
jet grouting
pressure jet
construction
pvc
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Pending
Application number
CN201610719244.4A
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Chinese (zh)
Inventor
白连军
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Sinohydro Engineering Bureau 4 Co Ltd
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Sinohydro Engineering Bureau 4 Co Ltd
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Priority to CN201610719244.4A priority Critical patent/CN106087994A/en
Publication of CN106087994A publication Critical patent/CN106087994A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D15/00Handling building or like materials for hydraulic engineering or foundations
    • E02D15/02Handling of bulk concrete specially for foundation or hydraulic engineering purposes
    • E02D15/04Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/34Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/36Concrete or concrete-like piles cast in position ; Apparatus for making same making without use of mouldpipes or other moulds

Abstract

The invention discloses a kind of high pressure jet grouting pore-forming dado structure and construction method thereof, this dado structure includes using down-the-hole drill to creep into formation injected hole;The PVC material tubing easily smashed by high pressure jet grouting it is provided with in described injected hole;Wherein, described PVC material tubing is the pressure marginal value carrying out high-pressure water cutting experiment thin ancient piece of jade, round, flat and with a hole in its centre pvc pipe between 5 MPas and 10 MPas.High pressure jet grouting pore-forming dado structure that the application provides and construction method thereof, construction method is simple, it is to avoid the collapse hole phenomenon during the stratum high pressure jet grouting that sand pebble layer, erratic boulder, block stone are more, is conducive to improving high pressure jet grouting construction quality.Make into porosity to be greatly improved, it is to avoid the personnel that cause because of collapse hole reason, equipment, the waste of material.

Description

A kind of high pressure jet grouting pore-forming dado structure and construction method thereof
Technical field
The present invention relates to High Pressure Jet Grouting Technique field, particularly relate to a kind of cobble, erratic boulder, block stone layer high-pressure injection Grouting pore-forming dado structure and construction method thereof.
Background technology
High pressure jet grouting (hereinafter referred to as high pressure jet grouting) is to use rig pore-forming, will be equipped with the grouting of specialty alloys nozzle Then pipe is lower is ejected water or serosity by nozzle with high-pressure hydraulic pump or high pressure slurry pump to subscribing position, impact cutting The soil body, makes grogs under the comprehensive functions such as the injection impulsive force of a fluid stream, centrifugal force and gravity, mixes with serosity stirring, and by one Fixed ratio is regular to be rearranged.After grout cures, form the solid of definite shape, play the anti-work blending reinforcing With.Conventional high pressure jet grouting is primarily adapted for use in soft layer, the gravel cobble too much to content and containing more erratic boulder or the ground of block stone Layer, one is to bury the phenomenon of spray boom underground owing to the impact of press water and cutting are easily caused the secondary collapse hole of high spray orifice in course of injection, Engineering construction quality is affected while causing the wastings of resources such as people, material, machine;Two is to use mud or bentonite to carry out retaining wall and exist It is DeGrain and the factor inapplicable such as costly in the more soil body of main erratic boulder, block stone content with sandy gravel.
Summary of the invention
The invention provides a kind of high pressure jet grouting pore-forming dado structure and construction method thereof.
The invention provides following scheme:
A kind of construction method of high pressure jet grouting pore-forming dado structure, the method includes:
The high pressure jet grouting demarcated on construction ground becomes hole location, uses crawler drill to creep into formation grout hole, In described drilling process, take steel thimble be set in outside the drilling tool of described crawler drill and jointly creep into, until described steel Sleeve pipe arrives design hole depth position to be stopped creeping into;
The drilling tool of described crawler drill is proposed, takes the PVC material tubing easily smashed by high pressure jet grouting and be embedded in Inside described steel thimble;
Described steel thimble is i.e. obtained described high pressure jet grouting pore-forming dado structure by extracting in described grout hole.
Preferred: described PVC material tubing is that the pressure marginal value carrying out high-pressure water cutting experiment is positioned at 5 MPas and 10,000,000 Thin ancient piece of jade, round, flat and with a hole in its centre pvc pipe between handkerchief.
Preferred: described thin ancient piece of jade, round, flat and with a hole in its centre pvc pipe is the thin ancient piece of jade, round, flat and with a hole in its centre PVC floral tube offering multiple through hole.
Preferred: described thin ancient piece of jade, round, flat and with a hole in its centre pvc pipe is many, described many thin ancient piece of jade, round, flat and with a hole in its centre pvc pipes be connected with each other after length and described filling Slurry hole depth is identical;Wherein, adjacent two thin ancient piece of jade, round, flat and with a hole in its centre pvc pipes use the fixing connection of adhesive tape.
A kind of high pressure jet grouting pore-forming dado structure using described method construction to be formed.
The specific embodiment provided according to the present invention, the invention discloses techniques below effect:
By the invention it is possible to realize a kind of high pressure jet grouting pore-forming dado structure and construction method thereof, in one realization side Under formula, this dado structure can include using down-the-hole drill to creep into formation injected hole;It is provided with in described injected hole easily by high pressure The PVC material tubing that jet groutinl smashes;Wherein, described PVC material tubing is carry out high-pressure water cutting experiment pressure critical The value thin ancient piece of jade, round, flat and with a hole in its centre pvc pipe between 5 MPas and 10 MPas.The application provide high pressure jet grouting pore-forming dado structure and execute Work method, construction method is simple, it is to avoid collapsing during the stratum high pressure jet grouting that sand pebble layer, erratic boulder, block stone are more Hole phenomenon, is conducive to improving high pressure jet grouting construction quality.Make into porosity to be greatly improved, it is to avoid the people that causes because of collapse hole reason Member, equipment, the waste of material.
Certainly, the arbitrary product implementing the present invention it is not absolutely required to reach all the above advantage simultaneously.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment The accompanying drawing used is needed to be briefly described, it should be apparent that, the accompanying drawing in describing below is only some enforcements of the present invention Example, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtains according to these accompanying drawings Obtain other accompanying drawing.
Fig. 1 is the high pressure jet grouting pore-forming dado structure schematic diagram that the embodiment of the present invention provides;
Fig. 2 is to creep into schematic diagram in the high pressure jet grouting pore-forming dado structure construction that the embodiment of the present invention provides.
In figure: grout hole 1, PVC material tubing 2, through hole 3, crawler drill 4, steel thimble 5, drilling tool 6, sandy soils A, boulder bed B.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on Embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained, broadly fall into present invention protection Scope.
Embodiment one
See Fig. 1, Fig. 2, the construction method of a kind of high pressure jet grouting pore-forming dado structure provided for the embodiment of the present invention one, As shown in Figure 1 and Figure 2, the method includes: the high pressure jet grouting demarcated on construction ground becomes hole location, uses crawler type to dive Drilling machine 4 creeps into formation grout hole 1, takes steel thimble 5 and be set in the brill of described crawler drill 4 in described drilling process Tool 6 is outside to creep into jointly, until described steel thimble 5 arrives design hole depth position and stops creeping into;By described crawler type hidden hole drilling The drilling tool 6 of machine 4 proposes, and takes the PVC material tubing 2 easily smashed by high pressure jet grouting and is embedded in described steel thimble 5 inside;By institute State steel thimble 5 and i.e. obtain described high pressure jet grouting pore-forming dado structure by extracting in described grout hole 1.High pressure jet grouting is at sandy gravel Stratum selection down-the-hole drill strip steel casing drilling (drilling efficiency is high) that layer, erratic boulder, block stone are more, sleeve pipe is straight along with rig drilling depth To at the bottom of hole.After full hole drilling terminates, propose drilling tool, manually bury pvc pipe underground, use tube drawing instrument to extract steel thimble more true Protect the recycling of steel thimble.Pvc pipe replaces mud or bentonite, plays on the stratum that sand pebble layer, erratic boulder, block stone are more Support got out the effect that high spray orifice is stable, it is to avoid because disturbance causes the phenomenon of high spray orifice collapse hole, for high pressure jet grouting sand pebble layer, The more stratum smooth construction of erratic boulder, block stone provides the necessary technical guarantee.Prevent because when height spray boring, grouting, collapse hole causes spray Tool is buried, and people, material, machine put into increase, and cost increases, the generation of the problems such as influence process construction quality.This construction technology Innovation be mainly manifested in: high pressure jet grouting work progress is additionally arranged retaining wall pvc pipe, adds burying underground of retaining wall pvc pipe.Should During pvc pipe slip casting, pvc pipe is smashed, thus does not affect the diffusion of serosity by water at a high speed, air-flow.
When this PVC specifically chosen, described PVC material tubing is the pressure marginal value carrying out high-pressure water cutting experiment Thin ancient piece of jade, round, flat and with a hole in its centre pvc pipe between 5 MPas and 10 MPas.The pvc pipe buried underground as sleeve pipe uses thin ancient piece of jade, round, flat and with a hole in its centre pvc pipe.As retaining wall Pvc pipe need to carry out on-the-spot test, is substantially carried out the determination of high-pressure water cutting pvc pipe marginal value (P faces):
1. when 5Mpa≤P face≤7Mpa time high pressure jet grouting effect obvious;
2. when 7Mpa < P face≤10Mpa time height spray effect can meet design requirement;
3., when P faces > 10Mpa, the increase height faced along with P sprays effect worse and worse;
4., when P faces < 5Mpa, the reduction retaining wall effect faced along with P is worse and worse.
Above-mentioned data are that the soil layer being main at sand pebble layer obtains when testing, and bigger at erratic boulder, block stone content Stratum can be carried out the determination of data if desired by test.
Pvc pipe preferentially chooses the most existing pvc pipe in construction location, when the most existing pvc pipe can not meet During above-mentioned requirements, contact producer is customized.Can hole on PVC sleeve pipe if desired, be fabricated to floral tube and bury underground, with Meet pvc pipe cutting critical values mandate.
The construction method that the embodiment of the present application provides mainly adds pvc pipe, reaches to protect hole wall, prevent collapse hole from burying underground Spray boom is buried underground and ensures that spray boom can be normally lower to the purpose designing position.Some engineering can be by PVC because of factors such as the construction period are tight Control is made floral tube and buries underground, and described thin ancient piece of jade, round, flat and with a hole in its centre pvc pipe is the thin ancient piece of jade, round, flat and with a hole in its centre PVC floral tube offering multiple through hole.With satisfied high sprinkling irrigation Slurry normal construction.Improve the work efficiency of high pressure jet grouting greatly.When reality is applied, can select to use according to actual hole depth Many pvc pipes, described thin ancient piece of jade, round, flat and with a hole in its centre pvc pipe is many, described many thin ancient piece of jade, round, flat and with a hole in its centre pvc pipes be connected with each other after length and described grouting hole depth Spend identical;Wherein, adjacent two thin ancient piece of jade, round, flat and with a hole in its centre pvc pipes use the fixing connection of adhesive tape.Retaining wall pvc pipe is attached, it is ensured that pvc pipe buries If to designing hole depth.Retaining wall pvc pipe need to be reliably connected, and adhesive tape etc. can be used to be attached.Pvc pipe diameter can be according to brill simultaneously Hole size is adjusted.The suitable pvc pipe of visible employing, as retaining wall material, can solve sand pebble layer, erratic boulder, block stone Personnel that more stratum high pressure jet grouting causes because of collapse hole phenomenon, material, the waste of machinery, and ensure that construction quality and construction Progress.
Embodiment two
The embodiment of the present application two can provide a kind of method used described in embodiment 1 high pressure jet grouting that construction is formed to become Holes protecting wall structure.
The high pressure jet grouting pore-forming dado structure that the embodiment of the present application provides, can be on the building such as dykes and dams, cofferdam ground Extensively apply during base Anti-seeping technology, preferable in stratum effects such as sandy soil, cohesive soil, loess.Can solve at sandy gravel The more stratum of layer, erratic boulder, block stone how to solve in high spray process because of collapse hole cause construction speed slowly, construction quality shortcoming, The problems such as serious waste of resources, cost are high.
High pressure jet grouting carries out construction and can not carry out retaining wall or use mud, swelling on stratum such as sandy soil, cohesive soil, loess Soil carries out retaining wall.And on the more stratum of sand pebble layer, erratic boulder, block stone for preventing high pressure jet grouting time collapse hole cause spray tool to be buried, People, material, machine put into increase, and cost increases, and influence process construction quality need to carry out high spray orifice retaining wall.And use mud, spray Profit soil retaining wall, one is effect inconspicuous, it is impossible to guarantee to execute collapse hole phenomenon will not occur in spray process;Two is mud or bentonite Because being mixed into of cement grout cannot be carried out secondary recovery utilization, cost is high;Three is mud or the bad control of bentonitic preparation System, it is impossible to after ensureing retaining wall, neither collapse hole is also beneficial to high-pressure water body impact, the effect of cutting soil.
In a word, the high pressure jet grouting pore-forming dado structure of the application offer and construction method thereof, construction method is the easiest OK, it is to avoid the collapse hole phenomenon during the stratum high pressure jet grouting that sand pebble layer, erratic boulder, block stone are more, be conducive to improving height spray Grouting construction quality.Make into porosity to be greatly improved, it is to avoid the personnel that cause because of collapse hole reason, equipment, the waste of material.
It should be noted that in this article, the relational terms of such as first and second or the like is used merely to a reality Body or operation separate with another entity or operating space, and deposit between not necessarily requiring or imply these entities or operating Relation or order in any this reality.And, term " includes ", " comprising " or its any other variant are intended to Comprising of nonexcludability, so that include that the process of a series of key element, method, article or equipment not only include that those are wanted Element, but also include other key elements being not expressly set out, or also include for this process, method, article or equipment Intrinsic key element.In the case of there is no more restriction, statement " including ... " key element limited, it is not excluded that Including process, method, article or the equipment of described key element there is also other identical element.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit protection scope of the present invention.All Any modification, equivalent substitution and improvement etc. made within the spirit and principles in the present invention, are all contained in protection scope of the present invention In.

Claims (5)

1. the construction method of a high pressure jet grouting pore-forming dado structure, it is characterised in that described method includes:
The high pressure jet grouting demarcated on construction ground becomes hole location, uses crawler drill to creep into formation grout hole, In described drilling process, take steel thimble be set in outside the drilling tool of described crawler drill and jointly creep into, until described steel Sleeve pipe arrives design hole depth position to be stopped creeping into;
The drilling tool of described crawler drill is proposed, takes the PVC material tubing easily smashed by high pressure jet grouting and be embedded in Inside described steel thimble;
Described steel thimble is i.e. obtained described high pressure jet grouting pore-forming dado structure by extracting in described grout hole.
2. require the method described in 1 according to power, it is characterised in that described PVC material tubing is to carry out high-pressure water cutting experiment The pressure marginal value thin ancient piece of jade, round, flat and with a hole in its centre pvc pipe between 5 MPas and 10 MPas.
3. require the method described in 2 according to power, it is characterised in that described thin ancient piece of jade, round, flat and with a hole in its centre pvc pipe is the thin ancient piece of jade, round, flat and with a hole in its centre PVC offering multiple through hole Floral tube.
4. require the method described in 2 according to power, it is characterised in that described thin ancient piece of jade, round, flat and with a hole in its centre pvc pipe is many, described many thin ancient piece of jade, round, flat and with a hole in its centre pvc pipes Length after being connected with each other is identical with the described grout hole degree of depth;Wherein, adjacent two thin ancient piece of jade, round, flat and with a hole in its centre pvc pipes use the fixing connection of adhesive tape.
5. the high pressure jet grouting that the method construction that a kind uses described in Claims 1-4 any one is formed becomes holes protecting wall to tie Structure.
CN201610719244.4A 2016-08-25 2016-08-25 A kind of high pressure jet grouting pore-forming dado structure and construction method thereof Pending CN106087994A (en)

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