CN116497814A - Green and efficient piling and wall forming construction method for soft soil and hard rock combined stratum - Google Patents
Green and efficient piling and wall forming construction method for soft soil and hard rock combined stratum Download PDFInfo
- Publication number
- CN116497814A CN116497814A CN202310653883.5A CN202310653883A CN116497814A CN 116497814 A CN116497814 A CN 116497814A CN 202310653883 A CN202310653883 A CN 202310653883A CN 116497814 A CN116497814 A CN 116497814A
- Authority
- CN
- China
- Prior art keywords
- slag
- hole
- concrete
- green
- slag discharging
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010276 construction Methods 0.000 title claims abstract description 62
- 239000011435 rock Substances 0.000 title claims abstract description 52
- 239000002689 soil Substances 0.000 title claims abstract description 26
- 239000002893 slag Substances 0.000 claims abstract description 157
- 238000007599 discharging Methods 0.000 claims abstract description 68
- 238000005553 drilling Methods 0.000 claims abstract description 67
- 239000004567 concrete Substances 0.000 claims abstract description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000004575 stone Substances 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims description 29
- 239000004576 sand Substances 0.000 claims description 23
- 238000003801 milling Methods 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 18
- 230000002787 reinforcement Effects 0.000 claims description 16
- 238000004140 cleaning Methods 0.000 claims description 14
- 238000012216 screening Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 7
- 239000011150 reinforced concrete Substances 0.000 claims description 4
- 238000005527 soil sampling Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 239000000428 dust Substances 0.000 abstract description 10
- 239000013049 sediment Substances 0.000 abstract description 10
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 239000002002 slurry Substances 0.000 description 7
- 230000009467 reduction Effects 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009527 percussion Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
- E02D13/08—Removing obstacles
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/66—Mould-pipes or other moulds
- E02D5/665—Mould-pipes or other moulds for making piles
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/06—Down-hole impacting means, e.g. hammers
- E21B4/14—Fluid operated hammers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses a green and efficient piling and wall forming construction method for a soft soil and hard rock combined stratum, which relates to the technical field of geotechnical engineering construction, wherein a sleeve is used for protecting a wall, and a hole is formed by drilling through a reverse circulation cluster type pneumatic down-the-hole hammer after the sleeve is drilled to a set position below a rock surface; the reverse circulation clustered pneumatic down-the-hole hammer is internally provided with a slag discharging channel extending to the bottom of the hammer head, and drill slag is extracted from the bottom of the hole through the slag discharging channel to be collected in a concentrated way; the slag discharging channel is a shared channel for discharging slag and pouring concrete; the slag discharging channel is provided with a water filling port, and water is filled into the slag discharging channel along the slag direction through the water filling port so as to moisten drilling slag. The invention adopts a reverse circulation slag discharging mode, so that the drill slag at the bottom of the hole can be thoroughly removed, and zero sediment at the bottom of the hole is realized; the slag discharging channel is used as a common channel for slag discharging and concrete pouring, so that the construction efficiency is improved; through the humidification of water injection in to the sediment passageway of arranging, prevent that the raise dust from appearing, can not produce the influence to hammer block itself, the concentrated collection of cooperation sediment stone reaches green's requirement.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering construction, in particular to a green and efficient pile forming and wall forming construction method for a soft soil and hard rock combined stratum.
Background
In the existing foundation building construction, various construction environments are usually encountered, for example, when pile hole construction is carried out on complex strata such as silt, rich water, karst cave and the like, a series of problems such as hole collapse, diameter shrinkage, overlarge filling coefficient of poured concrete and the like often occur, and in order to avoid the problems, casing drilling is usually needed for wall protection; and the casing is very slow in footage after drilling into the rock stratum, so that gas lift positive circulation slag discharge of an integral down-the-hole hammer or a cluster down-the-hole hammer is adopted for rock-socketed drilling. For example:
CN110566114a discloses a construction method for drilling and piling hard rock of a rotary drilling cluster type down-the-hole hammer, which comprises soil, a rotary drilling rig, a rotary drilling barrel, a down-the-hole hammer, a reinforcement cage and a pressure transmission device, wherein the rotary drilling rig uses the rotary drilling barrel to drill holes downwards on a soft soil layer to form primary holes; replacing a rotary drilling barrel of the rotary drilling rig with a down-the-hole hammer which is communicated with the pressure transmission device, and drilling the hard rock stratum by downward movement of the down-the-hole hammer to form a pile hole; the hard rock stratum is crushed to form rock slag, and the rock slag enters a down-the-hole hammer to realize rock slag transfer; in the drilling process, the cluster down-the-hole hammer drilling process forms positive circulation slag discharge.
CN113585959a discloses a double-power rock breaking construction method of a full sleeve pipe boot and a down-the-hole hammer heel pipe, which comprises the following steps: installing a full sleeve, lifting the down-the-hole hammer, and extending the down-the-hole hammer into the full sleeve from top to bottom; leading ring drilling and hole guiding are carried out on the pipe shoe, and drilling construction and chiseling construction are synchronously carried out on the rock stratum by the pipe shoe; the gas-liquid dust settling device and the serial barrel slag collecting device are synchronously adopted, so that floating objects are forced to fall and slag is collected in a concentrated mode. The scheme is to remove slag from the space between the periphery of the hammer body and the hole wall, and the scheme is a positive circulation slag removing mode.
In summary, although the scheme of combining the sleeve and the down-the-hole hammer is adopted, the main essence is that the down-the-hole hammer is used for discharging slag in a circulating way, the down-the-hole hammer is required to be lifted from the bottom of the hole frequently to sufficiently discharge slag in the hole, the construction process is complex, and the rock entering efficiency of the drilling machine is low; and the drilling slag is blown out from the periphery of the hammer body of the down-the-hole hammer, namely, the slag discharging mode is slag blowing, the process is uncontrollable, the drilling slag is discharged from the side surface of the hammer (or the drill rod) and reversely discharged from the ground, only the drilling slag can fall on the periphery of the orifice, and the drilling slag can not be collected in any position on the ground.
In addition, CN113585959a is provided with a dust settling device, but the down-the-hole hammer itself is a precision instrument, and is provided with an air supply pipeline connected with a piston, lubricating oil is required when the piston in the down-the-hole hammer moves to do work, the lubricating oil is continuously conveyed into the down-the-hole hammer through filling in high-pressure air, other impurities such as water cannot enter, and the scheme conveys water mist into the down-the-hole hammer through a gas-liquid dust settling device, so that the piston movement efficiency is reduced, meanwhile, the internal structure of the hammer body is greatly damaged, and the service life of the down-the-hole hammer is greatly reduced.
CN211524702U discloses a down-the-hole hammer, the bottom of the driving drill rod is welded with a driven drill rod, the bottom of the driven drill rod is welded with Cheng Zhatong, the bottom of the slag containing barrel is provided with a down-the-hole hammer, a slag sucking pipe is movably connected in the slag containing barrel, and one side of the slag sucking pipe is fixedly connected with a sand pump; according to the scheme, cheng Zhatong is additionally welded on the outer side of the hammer head, is blown into a slag containing barrel from the bottom of a hole in a positive circulation mode, and is discharged to the ground in a reverse circulation mode; because the high-pressure gas pressure of the down-the-hole hammer is very large, the drilling slag is blown from the bottom of the hammer head to fall into the slag containing barrel, the down-the-hole hammer has feasibility only at a certain depth in the ground, and when the depth is insufficient, the drilling slag can be blown out of the orifice by the high-pressure gas and cannot be controlled, so that the down-the-hole hammer is not applicable to the actual construction process.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a green and efficient piling and wall forming construction method for a soft soil and hard rock combined stratum, which adopts a mode of reversely circulating and directly discharging slag from the bottom of a hole, directly extracts drilling slag from the bottom of the hole through a closed slag discharging channel, can realize thorough removal of drilling slag at the bottom of the hole, and really realizes zero sediment at the bottom of the hole; the slag discharging channel can be used as a common channel for slag discharging and concrete pouring, so that construction equipment is reduced, and construction efficiency is improved; through the humidification of water injection in to the sediment passageway of arranging, prevent that the raise dust from appearing, can not produce any influence to down-the-hole hammer itself simultaneously to cooperate the concentrated collection of sediment stone, reach green's requirement.
In order to achieve the above object, the present invention is realized by the following technical scheme:
in a first aspect, the embodiment of the invention provides a green and efficient pile-forming construction method for a soft soil and hard rock combined stratum, wherein a sleeve is used for protecting a wall of a soft stratum, a hole is drilled through a reverse circulation cluster type pneumatic down-the-hole hammer after the sleeve is drilled to a set position below a rock surface, and the sleeve provides guiding protection wall and gas sealing effects for the reverse circulation cluster type pneumatic down-the-hole hammer; the reverse circulation cluster type pneumatic down-the-hole hammer is internally provided with a slag discharging channel extending to the bottom of the hammer head, the slag discharging channel is externally connected with a slag returning pipe, the slag returning pipe is connected with a collecting device, and drilling slag is extracted from the bottom of the hole through the slag discharging channel in the drilling process so as to be collected intensively;
the slag discharging channel is a shared channel for discharging slag and pouring concrete; the deslagging channel is connected with a concrete delivery pump through a concrete pipeline so that concrete can be poured into the deslagging channel;
the slag discharging channel is provided with a water filling port, and water is filled into the slag discharging channel along the slag direction through the water filling port so as to moisten drilling slag.
As a further implementation manner, the collecting device comprises a sand filter, and the slag return pipe is connected with a slag inlet of the sand filter; and (5) processing the raw materials by a sand filter to obtain machine-made sand and coarse stone aggregate.
As a further implementation mode, a conveying belt and a vibration screening machine are sequentially arranged at the discharge end of the sand filter, and the vibration screening machine is used for further screening to separate machine-made sand from coarse stone aggregate.
As a further implementation mode, concrete pouring is carried out on the cast-in-place piles of the plain piles, the post-inserted reinforcement cages or the precast piles by adopting a slag discharging channel.
As a further implementation, for reinforced concrete piles, the equipment is removed after hole forming, then a reinforcement cage is constructed, and then concrete is poured.
As a further implementation mode, the hole-forming pile position is determined based on the Beidou positioning technology, sleeve construction is firstly carried out on the hole-forming pile position, and soil is taken through soil taking equipment.
As a further implementation mode, the sleeve is pulled out, piles are formed, and concrete pouring is completed.
In a second aspect, the embodiment of the invention also provides a green and efficient wall forming construction method for the soft soil and hard rock combined stratum, based on the pile forming construction method, milling grooves after the sleeve and the reverse circulation clustered pneumatic down-the-hole hammer guide holes, and then lowering and installing a reinforcement cage after hole cleaning; and then the locking pipe or the joint box is pulled down, and the locking pipe or the joint box is pulled out after concrete is poured, so that the concrete is maintained.
As a further implementation mode, when the slot milling cannot be performed in time after the hole guiding is finished, sand can be used for backfilling; and grabbing the soft stratum and the backfill part before milling the groove or by using a grab bucket.
As a further implementation, the diameters and the number of the guide holes are arranged according to the width of the groove section; when the sleeve is not pulled out after the hole is led, a plurality of holes can be led simultaneously.
The beneficial effects of the invention are as follows:
(1) The invention adopts the reverse circulation cluster type pneumatic down-the-hole hammer with the built-in slag discharging channel, the drilling slag is directly extracted from the special slag discharging channel in the down-the-hole hammer head to any appointed position on the ground, the drilling slag is generated from the hole bottom and enters the slag discharging channel immediately, and the drilling slag is discharged to the appointed slag discharging place on the ground in a closed pipeline; the slag discharging channel in the reverse circulation clustered pneumatic down-the-hole hammer can meet the condition because the pouring concrete can be poured in the closed pipeline, so that the slag discharging channel can be used as a common channel for slag discharging and pouring concrete; however, the traditional rock drilling tool does not have a pipeline which can be used for pouring concrete, and the concrete cannot be poured by the drilling tool after the hole is formed, so that the concrete pouring process can be optimized;
and the slag discharging channel is a closed pipeline, and a proper amount of water is injected into the slag discharging channel to moisten the dried drilling slag, so that dust emission is prevented, and the down-the-hole hammer cannot be influenced.
(2) The invention adopts the casing wall protection, and the casing drills below the rock surface, thereby providing guiding and sealing functions for the reverse circulation clustered pneumatic down-the-hole hammer; solves the problems of air leakage, large air loss and unstable slag discharge of the joint surface of the soft stratum and the hard stratum; the slag is discharged through a slag discharging channel of the reverse circulation cluster type pneumatic down-the-hole hammer, so that the pile forming is completed, and the effect of cleaning holes and not forming slag is achieved; compared with the traditional drilling methods such as a positive circulation down-the-hole hammer, a rotary drilling rig, a percussion drill and the like, the method reduces the adoption of a slag removing drilling tool or a reverse circulation cleaning Kong Guocheng after hole forming; and the method reduces the secondary hole cleaning caused by the slag falling of the soft stratum or the overlong waiting and pouring time after hole cleaning, and is suitable for hole forming construction of soft soil and hard rock combined stratum. (3) According to the invention, corresponding concrete pouring modes are selected according to different cast-in-place piles, and concrete pouring is carried out on cast-in-place piles of plain piles, post-inserted reinforcement cages or precast piles by replacing pouring channels with slag discharging channels, so that the control of the filling coefficient of the follow-up concrete is facilitated, and the advantages of no material waste and engineering cost reduction are achieved; and the slag discharging channel is provided with a water filling port, so that water can be filled along the slag discharging channel along the slag discharging direction, dust can be prevented from rising in the dry hole construction process, and the purpose of green construction is achieved.
(4) According to the invention, the discharged slag stones are directly collected in a concentrated manner through the collecting device, the crushed rock materials can be directly utilized, the problem that the conventional slag blowing mode cannot be directly collected in a concentrated manner is solved, and compared with the slag stones formed by a rotary drilling rig and the like, a plurality of working procedures such as transferring and recycling are reduced, and engineering cost is reduced; the drill slag is concentrated to collect the protective wall of the collecting sleeve, the hole forming efficiency is high, green construction is achieved, and noise is low in the whole construction process.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a construction flow diagram in accordance with one or more embodiments of the invention;
FIG. 2 is a schematic illustration of casing construction according to one or more embodiments of the present disclosure;
FIG. 3 is a schematic illustration of reverse circulation clustered pneumatic down-the-hole hammer construction in accordance with one or more embodiments of the present invention;
FIG. 4 is a schematic view of a partial structure of a slag discharging passage according to one or more embodiments of the present invention;
fig. 5 is a diagram of the present invention in comparison to existing construction effects in accordance with one or more embodiments.
The device comprises a reverse circulation cluster type pneumatic down-the-hole hammer, a sleeve, a drill, a 4-way air compressor, a 5-way high-pressure glue pipe, a 6-way slag return pipe, a 7-way water tank, a 8-way booster pump, a 9-way sand filter, a 10-way slag inlet, a 11-way sand, a 12-way coarse stone aggregate, a 13-way conveyor belt, a 14-way vibration screening machine, a 15-way slag discharge channel, a 16-way water injection port, a 17-way sleeve driving device, a 18-way grouting port, a 19-way concrete conveying pump, a 20-way concrete pipeline.
Detailed Description
Embodiment one:
aiming at the problems of the prior hole forming construction that an integral down-the-hole hammer or a cluster down-the-hole hammer is adopted for gas lift positive circulation slag discharge, such as lower rock entering efficiency, requirement for secondary hole cleaning and the like, the embodiment provides a green and efficient pile forming construction method for soft soil and hard rock combined strata, as shown in figure 1, after a soft stratum adopts a sleeve 2 for protecting a wall, the sleeve 2 drills into a hole through a reverse circulation cluster pneumatic down-the-hole hammer 1 after drilling to a set position below a rock surface, and the sleeve 2 provides guiding protection wall and gas sealing function for the reverse circulation cluster pneumatic down-the-hole hammer 1; discharging drill slag from the slag discharging channel 15 during drilling; and pouring concrete by adopting a slag discharging channel 15 or a reserved pouring channel.
Specifically, the method comprises the following steps:
step one, construction preparation: and (5) leveling and compacting the field, and determining the pile position.
In the embodiment, a Beidou positioning technology is adopted to determine the hole-forming pile position; the Beidou positioning technology adopts a Beidou multi-star positioning and orientation host machine, and combines a dynamic positioning system of an inertial navigation technology and a high-precision satellite positioning and orientation technology. Step two, construction of a sleeve 2: the casing 2 is adopted for protecting the wall of the soft stratum, so that the whole pile forming process has no environmental pollution of slurry protecting the wall.
Because the joint surface of the soft rock stratum and the rock stratum is not necessarily a plane, the casing 2 is constructed to the joint surface and cannot meet the sealing of high-pressure air flow; as shown in fig. 2, the casing 2 of the embodiment is constructed below a rock surface, and the whole casing 2 is immersed into the rock stratum for one week, so that guiding and gas sealing effects are provided for the reverse circulation clustered pneumatic down-the-hole hammer 1, and the problems of air leakage and high air loss of the joint surface of the soft and hard stratum are solved.
The casing 2 is constructed through a casing driving device 17, and the casing driving device 17 can drill by a rotary drilling rig power head driving casing 2, a multifunctional pile frame power head driving casing 2, a pipe twisting machine driving casing 2, a vibrating hammer driving casing 2 or a full rotary drilling rig driving casing 2 and the like; meanwhile, equipment such as a grab bucket, a rotary drilling rig, a pile frame and the like can be adopted for soil sampling.
Step three: after the casing pipe 2 is drilled below the rock surface, a reverse circulation bundling pneumatic down-the-hole hammer 1 is adopted to perform rock-socketing drilling hole formation; because the casing pipe 2 is constructed below the rock surface, the air tightness requirement of the reverse circulation clustered pneumatic down-the-hole hammer 1 can be ensured, and the efficient rock entering drilling operation is realized.
As shown in fig. 3, a reverse circulation cluster type pneumatic down-the-hole hammer 1 is arranged on a drilling machine 3, the reverse circulation cluster type pneumatic down-the-hole hammer 1 is connected with an air compressor 4 through a high-pressure glue pipe 5, and is connected with a water tank 7 through a booster pump 8; a slag discharging channel 15 is arranged in the reverse circulation clustered pneumatic down-the-hole hammer 1, and the slag discharging channel 15 extends to the bottom of the hammer head; the problems of unstable slag discharge, hole collapse and air leakage are solved through the wall protection of the sleeve pipe 2, the environment pollution of the slurry wall protection in the whole pile forming process is avoided, and the effects of hole cleaning and no sediment are achieved after pile forming; and slag is discharged through the slag discharging channel 15, so that the down-the-hole hammer does not need to be lifted repeatedly, and the construction process is simplified.
In the reverse circulation slag discharging mode of the embodiment, the drilling slag is directly pumped from a slag discharging channel 15 special for the bottom of the hammer head of the down-the-hole hammer to discharge the specified position on the ground, and at the moment when the drilling slag is generated from the bottom of the hole, the drilling slag is discharged to the specified slag discharging place on the ground in a closed pipeline, and meanwhile, the closed pipeline provides conditions for pouring concrete. Since the conventional rock drilling tool (positive circulation down-the-hole hammer) itself has no pipe that can be used to cast concrete, the drilling tool itself cannot be used to cast concrete after the hole is formed. And the traditional construction method is that the sediment at the bottom of the hole cannot be thoroughly cleaned, the hole depth is measured after the drill is lifted, and then the sediment is repeatedly cleaned until the sediment meets the requirement, and concrete can not be poured into the steel reinforcement cage and the guide pipe in the conventional mode. The reverse circulation is adopted in the embodiment, slag is directly discharged from the bottom of the hole, zero slag deposition at the bottom of the hole can be achieved, the whole process of the down-the-hole hammer, the drill rod and the drilling machine is in rigid connection, the actual hole depth can be accurately measured through the lengths of the down-the-hole hammer and the drill rod, the slag discharge pipeline can be directly utilized for pouring after confirmation, the efficiency can be improved, and the pile forming quality is better.
The embodiment utilizes the jet-suction principle to remove slag, has no requirement on water and electricity, and can still realize slag removal under the anhydrous condition; whereas existing pumping modes must be powered on and rely on water to do so.
The reverse circulation clustered pneumatic down-the-hole hammer 1 is provided with a grouting port 18 communicated with the slag discharging channel 15, and the grouting port 18 is connected with a concrete conveying pump 19 through a concrete pipeline 20; so as to realize deslagging and concrete pouring through the shared deslagging channel 15.
When the slag is discharged, the slag discharging channel 15 is connected with the slag returning pipe 6, the slag can be discharged to a designated position, the discharged slag is directly collected in a concentrated mode through the collecting device, broken rock can be directly utilized, the problem that the broken rock cannot be directly collected in a concentrated mode due to the existing slag blowing mode is solved, and compared with the slag after hole forming of a rotary drilling rig and the like, a plurality of working procedures of transferring and recycling are reduced, and engineering cost is reduced.
In this embodiment, the slag stone centralized collection mode is: the slag returning pipe 6 is connected with a slag inlet 10 of the sand filter 9, slag and stone centralized treatment is realized through the sand filter 9, and machine-made sand 11 and coarse stone aggregate 12 are obtained after the treatment, so that the effect of green and environment protection is achieved.
Further, a conveyor belt 13 is arranged at the slag outlet of the sand filter 9, the conveyor belt 13 conveys the machine-made sand 11 and the coarse stone aggregate 12 to a vibration screening machine 14, and the machine-made sand 11 and the coarse stone aggregate 12 are separated by further screening by the vibration screening machine 14.
Under the condition of less groundwater, dust is easy to generate in dry hole operation, as shown in fig. 4, the slag discharging channel 15 of the embodiment is connected with the water filling port 16, and water is filled into the slag discharging channel 15 along the slag direction through the water filling port 16, so that the purpose of slag discharging and humidifying is achieved, dust can be prevented, and the green environment protection requirement is further ensured.
The grouting port 18, the water filling port 16, and the connection with the slag discharging passage 15 and the slag returning pipe 6 of the present embodiment are closed when not in use.
Step four: and pouring the cast-in-place pile after deslagging is finished.
The cast-in-place pile is provided with an element pile and a reinforced concrete pile, wherein the element pile is only cast with concrete after hole forming, and a reinforcement cage is not inserted; the reinforced concrete pile has two kinds of reinforced cage inserted first and concrete poured later and reinforced cage inserted first and concrete poured later.
Further, concrete is poured into the pile, the post-inserted reinforcement cage or the cast-in-place pile of the precast pile by adopting a slag discharging channel 15; the slag discharging channel 15 is externally connected with a concrete pipeline 20, and concrete pouring operation is carried out through a concrete conveying pump 19; a dedicated perfusion channel may also be reserved.
For the concrete pile which is firstly inserted with the reinforcement cage and then poured, the equipment is removed after hole forming, then the reinforcement cage framework is aligned with the hole forming pile position and is lowered to the set position, and then the concrete is poured.
The slag discharging channel 15 is used for pouring concrete, cement soil or mortar, and a reinforcement cage can be inserted into the slag discharging channel or a precast pile can be inserted into the slag discharging channel.
Step five: and (5) sleeve 2 is pulled out, piles are formed, and concrete pouring is completed.
The embodiment adopts the casing 2 for protecting the wall, and the casing 2 drills below the rock surface, so that the guiding and gas sealing functions are provided for the reverse circulation clustered pneumatic down-the-hole hammer 1, and the problems of air leakage, high air loss and unstable slag discharge of the joint surface of the soft and hard stratum are solved; the problems that the soft and hard stratum joint surface is flushed by air leakage to form a cavity to collapse, the concrete is poured over-square and the like are avoided. The quality of hole forming and pile forming can be ensured, the quality problems of necking, hole collapse and the like of a soft stratum are solved, slurry is not needed, no environmental pollution is caused, and measures such as later-stage slurry outward transportation and treatment are reduced. The embodiment realizes that the pile forming can finish hole cleaning without slag forming; compared with the traditional drilling methods such as a positive circulation down-the-hole hammer, a rotary drilling rig, a percussion drill and the like, the method reduces the adoption of a slag removing drilling tool or a reverse circulation cleaning Kong Guocheng after hole forming; and the secondary hole cleaning caused by the slag falling of the soft stratum or the overlong waiting and pouring time after hole cleaning is reduced. The pore-forming method of the embodiment is beneficial to the control of the filling coefficient of the follow-up concrete, and has the advantages of no material waste and engineering cost reduction.
According to the concrete pouring method, corresponding concrete pouring modes are selected according to different pouring piles, and concrete pouring is carried out on the plain piles or the pouring piles of post-construction reinforcement cages by replacing pouring channels with slag discharging channels 15, so that the construction process is optimized, and the work efficiency is improved.
In general, in order to achieve the purpose of green construction, the embodiment firstly protects the wall through the sleeve 2, and no slurry pollution is caused; the concentrated collection of drill slag is combined, so that dust is not raised; moreover, the pore-forming efficiency is high, the consumption of diesel oil per cubic meter of rock drilled is lower than that of the traditional process, and the carbon dioxide emission can be reduced.
Embodiment two:
the embodiment provides a green and efficient wall forming construction method for a soft soil and hard rock combined stratum, which specifically comprises the following steps:
step 1, preparing construction, measuring and lofting, and manufacturing a guide wall;
step 2, dividing groove segments;
step 3, guiding holes between the sleeve 2 and the reverse circulation cluster type pneumatic down-the-hole hammer 1, and adopting the pile forming construction method in the first embodiment:
(1) the diameter and the number of the guide holes are reasonably arranged according to the width of the groove section;
in the embodiment, the sleeve 2 and the reverse circulation cluster type pneumatic down-the-hole hammer 1 are used for guiding holes, and the center distance between two adjacent guiding holes can be reduced due to the higher verticality; the diameter of the guide holes is reasonably arranged or the number of the guide holes is increased according to the width of the groove section; the loss of a cutter of a working device of the later-stage slot milling machine is reduced, the guarantee of slot milling precision is utilized, and the reduction or no need of wall surface trimming and the like after the foundation pit is excavated.
When the sleeve 2 is not pulled out after the hole is led, a plurality of holes can be led at the same time; the casing 2 drilling of the next hole is carried out free of the already drilled casing by means of the casing drive 17.
(2) The soft stratum adopts the casing 2 to protect the wall, and can be drilled by a rotary drilling rig power head driving casing 2, a multifunctional pile frame power head driving casing 2, a pipe rubbing machine driving casing 2, a vibrating hammer driving casing 2 or a full rotary drilling rig driving casing 2 and the like; meanwhile, equipment such as a punching grab bucket, a rotary drilling rig, a pile frame and the like can be adopted for soil sampling;
(3) after the casing pipe 2 is drilled below the rock surface, a reverse circulation cluster type pneumatic down-the-hole hammer 1 is adopted to conduct rock-socketing drilling and hole guiding; (4) after the groove section hole guiding is completed, extracting all the sleeves 2 of the hole guiding;
(5) if the slot cannot be milled in time after the hole is finished, firstly, backfilling with sandy soil; and grabbing the soft stratum and the backfill part before milling the groove or by using a grab bucket and the like.
Step 4, milling grooves and cleaning the bottom to change slurry;
the groove is repaired by a groove milling machine and other methods, so that the vertical precision of the formed groove is very high, and the construction problems of high precision, high efficiency, high quality and low cost of the complex stratum continuous wall are solved. The perpendicularity and the quantity of the guide holes are changed, so that the stress condition of the slot milling machine is improved.
Step 5, manufacturing a reinforcement cage, cleaning a groove, changing slurry and checking the groove;
step 6, installing a reinforcement cage;
step 7, lower locking port pipe or joint box;
step 8, pouring concrete;
step 9, pulling out the locking notch pipe or the joint box;
and 10, curing the concrete.
Further, as shown in fig. 5, the condition that the conventional wall forming construction exceeds a vertical surface (the right side wall of the foundation pit in fig. 5) exists in an unfixed area, so that the wall surface needs to be manually trimmed when the foundation pit is excavated, if the joint position is reserved, the wall surface is more complicated to process, the construction efficiency is affected, and the construction cost is increased; the construction effect of this embodiment is shown in fig. 5 as the left side wall of the foundation pit.
The reverse circulation cluster down-the-hole hammer technology of the first embodiment is used for the construction of the underground continuous wall, so that the perpendicularity of the pilot hole is good; from the atress that adopts the grooving machine to analyze, because the straightness that hangs down of traditional technology guide hole is relatively poor, hole interval is great when a groove is arranged the hole generally, and this embodiment can adopt the hole that hole interval is very little, and the straightness that hangs down of every guide hole is high, and the atress on two holes of two milling wheels of grooving machine respectively corresponds better, reduces the time of frequently rectifying in the milling machine drilling process, also corresponding reduction milling wheel pick's abnormal wear simultaneously, further reduces the time of changing milling wheel pick. Analysis from the milling quantity also reduces the milling quantity of the grooving machine considerably.
Taking a rock stratum with the pressure of more than 70MPa as an example, the efficiency of the slot milling machine is obviously reduced on the premise of no hole guiding; when this part of the workload is reduced, the construction efficiency is improved.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (10)
1. A green and efficient pile forming construction method for a soft soil and hard rock combined stratum is characterized in that a sleeve is used for protecting a wall in a soft stratum, a hole is drilled through a reverse circulation cluster type pneumatic down-the-hole hammer after the sleeve is drilled to a set position below a rock surface, and the sleeve provides guiding protection wall and gas sealing effects for the reverse circulation cluster type pneumatic down-the-hole hammer;
the reverse circulation cluster type pneumatic down-the-hole hammer is internally provided with a slag discharging channel extending to the bottom of the hammer head, the slag discharging channel is externally connected with a slag returning pipe, the slag returning pipe is connected with a collecting device, the slag returning pipe directly enters the slag discharging channel at the bottom of the reverse circulation cluster type pneumatic down-the-hole hammer when drilling slag is generated in the drilling process, and is discharged to a designated position from the bottom of the hole in the closed slag discharging channel to be collected intensively;
the slag discharging channel is a shared channel for discharging slag and pouring concrete; the deslagging channel is connected with a concrete delivery pump through a concrete pipeline so that concrete can be poured into the deslagging channel;
the slag discharging channel is provided with a water filling port, and water is filled into the slag discharging channel along the slag direction through the water filling port so as to moisten drilling slag.
2. The green and efficient pile forming construction method for the soft soil and hard rock combined stratum is characterized in that the collecting device comprises a sand filter, and a slag return pipe is connected with a slag inlet of the sand filter; and (5) processing the raw materials by a sand filter to obtain machine-made sand and coarse stone aggregate.
3. The green and efficient pile forming construction method for the soft soil and hard rock combined stratum is characterized in that a conveyor belt and a vibration screening machine are sequentially arranged at the discharge end of the sand filter, and the vibration screening machine is used for further screening to separate machine-made sand from coarse stone aggregate.
4. The green and efficient pile forming construction method for soft soil and hard rock combined strata according to claim 1, wherein concrete pouring is carried out on a cast-in-place pile of a plain pile, a post-inserted reinforcement cage or a precast pile by adopting a slag discharging channel.
5. The green and efficient pile forming construction method for soft soil and hard rock combined strata according to claim 4, wherein for the reinforced concrete pile, after the equipment is perforated, the reinforced cage is constructed and then the concrete is poured.
6. The green and efficient pile forming construction method for the soft soil and hard rock combined stratum is characterized by determining a hole forming pile position based on Beidou positioning technology, performing sleeve construction on the hole forming pile position firstly, and simultaneously performing soil sampling through soil sampling equipment.
7. The green and efficient pile forming construction method for the soft soil and hard rock combined stratum is characterized by comprising the steps of sleeve pulling, pile forming and concrete pouring.
8. The green and efficient wall forming construction method for the soft soil and hard rock combined stratum is characterized by comprising the steps of milling grooves after a sleeve and a reverse circulation clustered pneumatic down-the-hole hammer are used for guiding holes, and then lowering and installing a reinforcement cage after hole cleaning based on the pile forming construction method according to any one of claims 1-7; and then the locking pipe or the joint box is pulled down, and the locking pipe or the joint box is pulled out after concrete is poured, so that the concrete is maintained.
9. The green and efficient wall forming construction method for the soft soil and hard rock combined stratum, which is disclosed in claim 8, is characterized in that sand can be used for backfilling when a slot cannot be milled in time after the hole is led; and grabbing the soft stratum and the backfill part before milling the groove or by using a grab bucket.
10. The green and efficient wall forming construction method for the soft soil and hard rock combined stratum, which is disclosed in claim 9, is characterized in that the diameters and the number of the guide holes are arranged according to the width of the groove section; when the sleeve is not pulled out after the hole is led, a plurality of holes can be led simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310653883.5A CN116497814A (en) | 2023-06-01 | 2023-06-01 | Green and efficient piling and wall forming construction method for soft soil and hard rock combined stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310653883.5A CN116497814A (en) | 2023-06-01 | 2023-06-01 | Green and efficient piling and wall forming construction method for soft soil and hard rock combined stratum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116497814A true CN116497814A (en) | 2023-07-28 |
Family
ID=87320361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310653883.5A Pending CN116497814A (en) | 2023-06-01 | 2023-06-01 | Green and efficient piling and wall forming construction method for soft soil and hard rock combined stratum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116497814A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117052340A (en) * | 2023-08-14 | 2023-11-14 | 山东鼎推岩土工程有限公司 | Anti-splashing device and method for down-the-hole hammer construction |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202786032U (en) * | 2012-09-16 | 2013-03-13 | 中铁十九局集团第一工程有限公司 | TBM (Tunnel boring machine) tunneling rock ballast recycling and processing device |
| CN107724953A (en) * | 2017-09-27 | 2018-02-23 | 孙志勤 | The down-the-hole hammer reverse circulating drilling process construction method of Fluid Sealing |
| CN110566114A (en) * | 2019-09-04 | 2019-12-13 | 深圳市工勘岩土集团有限公司 | Hard rock drilling pile-forming construction method of rotary excavating cluster type down-the-hole hammer |
| CN111441723A (en) * | 2020-05-19 | 2020-07-24 | 吉林大学 | Reverse circulation pipe following drilling construction device for large-diameter down-the-hole hammer |
-
2023
- 2023-06-01 CN CN202310653883.5A patent/CN116497814A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202786032U (en) * | 2012-09-16 | 2013-03-13 | 中铁十九局集团第一工程有限公司 | TBM (Tunnel boring machine) tunneling rock ballast recycling and processing device |
| CN107724953A (en) * | 2017-09-27 | 2018-02-23 | 孙志勤 | The down-the-hole hammer reverse circulating drilling process construction method of Fluid Sealing |
| CN110566114A (en) * | 2019-09-04 | 2019-12-13 | 深圳市工勘岩土集团有限公司 | Hard rock drilling pile-forming construction method of rotary excavating cluster type down-the-hole hammer |
| CN111441723A (en) * | 2020-05-19 | 2020-07-24 | 吉林大学 | Reverse circulation pipe following drilling construction device for large-diameter down-the-hole hammer |
Non-Patent Citations (1)
| Title |
|---|
| 郭正兴等: "《土木工程施工 第3版》", 东南大学出版社, pages: 79 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117052340A (en) * | 2023-08-14 | 2023-11-14 | 山东鼎推岩土工程有限公司 | Anti-splashing device and method for down-the-hole hammer construction |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110387880A (en) | A kind of bored pile construction method | |
| CN112554177B (en) | Construction method of ultra-long small-diameter cast-in-situ bored pile | |
| CN102322058B (en) | Construction process and equipment for downhole impacting high-pressure jet grouting pile | |
| CN101831906B (en) | Dry type pneumatic rock drilling pile-driving machine and working method thereof | |
| CN104947690B (en) | Grooving construction method for embedding underground continuous wall into rock | |
| CN111335306A (en) | Rapid construction method for deep and thick hard rock section drilled pile | |
| CN104832082A (en) | Pneumatic DTH hammer reverse circulation slagging construction process for rotary drilling rig | |
| CN116497814A (en) | Green and efficient piling and wall forming construction method for soft soil and hard rock combined stratum | |
| CN111519679A (en) | Rapid grooving construction method for micro-weathering rock of diaphragm wall | |
| CN109339051A (en) | A kind of MJS engineering method pile construction method | |
| CN110984221A (en) | Construction method for reinforcing end socket at initial end of air shaft and guide wall structure | |
| CN112252332A (en) | Grooving construction method for underground diaphragm wall of ultra-deep shaft | |
| CN110528498A (en) | A kind of construction method of the continuous wall trench underground of granite geology | |
| CN203584301U (en) | Hole guide equipment | |
| CN105041246A (en) | Direct-reverse circulation DTH hammer transfer structure | |
| CN112196494B (en) | Construction process and construction equipment for geological pipeline jointed between rock and soil layer | |
| CN110331936B (en) | Combined drilling bottom-expanding pile-planting construction method | |
| CN116220546A (en) | Construction method for combining super-thick hard rock condition large-diameter long piles into holes | |
| CN210530738U (en) | Pile system is planted in drilling in groups | |
| CN204663435U (en) | Reverse circulation down-hole hammer transformational structure | |
| CN115637973A (en) | Long pile casing sleeve-free rotary excavating hard cutting secant pile hole forming construction process | |
| CN203080528U (en) | Drilling and spraying integrated foundation treating special drilling tool assembly | |
| CN104988981B (en) | A kind of well construction method of riding on present situation operation shield method drainage pipeline | |
| CN211735404U (en) | Anti-over-irrigation system for long spiral bored pile | |
| CN113529768A (en) | Construction method of impervious wall |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |