CN113756736A - Pile foundation post-grouting system based on drilling slag recycling and construction method - Google Patents
Pile foundation post-grouting system based on drilling slag recycling and construction method Download PDFInfo
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- CN113756736A CN113756736A CN202111001768.7A CN202111001768A CN113756736A CN 113756736 A CN113756736 A CN 113756736A CN 202111001768 A CN202111001768 A CN 202111001768A CN 113756736 A CN113756736 A CN 113756736A
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- 238000005553 drilling Methods 0.000 title claims abstract description 141
- 239000002893 slag Substances 0.000 title claims abstract description 134
- 238000010276 construction Methods 0.000 title claims abstract description 32
- 238000004064 recycling Methods 0.000 title claims abstract description 13
- 239000002002 slurry Substances 0.000 claims abstract description 212
- 239000011362 coarse particle Substances 0.000 claims abstract description 51
- 239000002689 soil Substances 0.000 claims abstract description 50
- 238000007711 solidification Methods 0.000 claims abstract description 44
- 230000008023 solidification Effects 0.000 claims abstract description 44
- 238000004062 sedimentation Methods 0.000 claims abstract description 28
- 238000001914 filtration Methods 0.000 claims abstract description 23
- 239000002699 waste material Substances 0.000 claims abstract description 20
- 238000007569 slipcasting Methods 0.000 claims abstract description 4
- 239000004568 cement Substances 0.000 claims description 26
- 239000000523 sample Substances 0.000 claims description 25
- 239000010419 fine particle Substances 0.000 claims description 20
- 239000011440 grout Substances 0.000 claims description 13
- 238000003825 pressing Methods 0.000 claims description 7
- 239000012466 permeate Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000003860 storage Methods 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims 1
- 230000003014 reinforcing effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 9
- 238000011049 filling Methods 0.000 description 6
- 238000011065 in-situ storage Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
- E21B21/065—Separating solids from drilling fluids
- E21B21/066—Separating solids from drilling fluids with further treatment of the solids, e.g. for disposal
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- 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
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/062—Arrangements for treating drilling fluids outside the borehole by mixing components
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/0023—Slurry
-
- 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
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- General Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Structural Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Civil Engineering (AREA)
- Paleontology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a pile foundation post-grouting system and a construction method based on drilling slag recycling, and belongs to the technical field of pile foundation construction; the slip casting system includes: the device comprises a drilling slag conveying pipe, a drilling slag filtering device, a mud sedimentation tank, a mud conveying pipe, a circumferential solidification mud pump and a layered pressure conveying device; one side of the drilling slag filtering device is connected with a drilling slag conveying pipe, and the mud sedimentation tank is arranged at the lower side of the drilling slag filtering device; one end of the slurry conveying pipe is connected with the annular curing slurry pump; the solidification slurry pump is provided with two output ports; the solidified slurry layered pressure feeding device comprises a lower solidified slurry vertical pipe and an upper solidified slurry vertical pipe, wherein one end of the lower solidified slurry vertical pipe is connected with a solidified slurry pump, and the other end of the lower solidified slurry vertical pipe is connected with a lower solidified slurry ring; one end of the upper layer solidified mud vertical pipe is connected with a solidified mud pump; the invention has the advantages of fully recovering drilling slag waste generated in the construction of pile holes, reinforcing coarse particle soil layers and improving the bearing capacity of pile foundations.
Description
Technical Field
The invention relates to the technical field of pile foundation construction, in particular to a pile foundation post-grouting system and a construction method based on drilling slag recycling.
Background
Cast-in-place bored piles are a type of foundation that has been used on a large scale. In the pore-forming construction process of the cast-in-situ bored pile, a large amount of construction wastes such as slurry and coarse-grained gravel can be generated, huge engineering cost is often consumed for treating the wastes, and adverse environmental influences are generated simultaneously. In addition, during the construction of the cast-in-situ bored pile, pile side mud skin and pile end sediment are usually generated, and after the sediment and mud waste are filtered and separated, the small-particle mud is applied to the post-grouting process of the pile foundation, which is an effective method for treating the problems.
For example, the invention patent with the patent number of CN112392036A provides a cast-in-place pile construction device and a method with functions of slurry circulation, separation and slag removal, and the main idea of the technical scheme is to filter and separate the sludge at the pile end and the wastes generated during drilling and recycle the qualified slurry detected in the sludge. However, the above technical scheme has the following defects that when the cast-in-place pile passes through a coarse-particle soil layer, the retention rate of cement paste pressed in by the post grouting process is low, and the effect of effectively solidifying the soil layer is difficult to achieve.
Aiming at the problem that the post-grouting of wastes and coarse-grained soil layers generated in the construction of cast-in-situ bored piles cannot be effectively solved at present, deep research needs to be carried out. It is urgent need through the integrated treatment to the construction waste, establish one set of reasonable slip casting construction system to the realization is with waste recycling and to the effectual post slip casting construction in coarse grain soil layer, in order to reduce the treatment cost and promote pile foundation bearing capacity.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a pile foundation post-grouting system and a construction method based on drilling slag recycling.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention firstly discloses a pile foundation post-grouting system based on drilling slag recycling, which comprises: the device comprises a drilling slag conveying pipe, a drilling slag filtering device, a mud sedimentation tank, a mud conveying pipe, a circumferential solidification mud pump, a solidification mud layering pressure feeding device and a lateral mud pressing device;
one side of the drilling slag filtering device is connected with a drilling slag conveying pipe, and the mud sedimentation tank is arranged at the lower side of the drilling slag filtering device; the drilling slag conveying pipe conveys the drilling slag and the slurry waste into a drilling slag filtering device for filtering and separating, wherein the fine particle slurry with smaller particle size can fall into a slurry sedimentation tank; one end of the slurry conveying pipe extends into the slurry sedimentation tank, and the other end of the slurry conveying pipe is connected with the annular solidification slurry pump; the solidification slurry pump is provided with two output ports;
the solidified slurry layered pressure feeding device comprises a lower solidified slurry vertical pipe and an upper solidified slurry vertical pipe, wherein one end of the lower solidified slurry vertical pipe is connected with one output port of the solidified slurry pump, and the other end of the lower solidified slurry vertical pipe is connected with a lower solidified slurry ring which is communicated with the lower solidified slurry vertical pipe and is provided with a hollow inner cavity; one end of the upper layer solidified slurry vertical pipe is connected with the other output port of the solidified slurry pump, and the other end of the upper layer solidified slurry vertical pipe is connected with an upper layer solidified slurry ring which is communicated with the upper layer solidified slurry vertical pipe and is provided with a hollow inner cavity; the lower layer solidified slurry ring and the upper layer solidified slurry ring are both positioned in the cast-in-place pile, the lower layer solidified slurry ring is arranged at the lower section of the coarse particle soil layer, and the upper layer solidified slurry ring is arranged at the upper section of the coarse particle soil layer; slurry outlet holes are formed in the outer side ring walls of the lower layer solidified slurry ring and the upper layer solidified slurry ring, and the orifice of each slurry outlet hole corresponds to the coarse particle soil layer;
the lateral grouting device comprises a lateral grouting vertical pipe vertically arranged in a cast-in-place pile, the top end of the lateral grouting vertical pipe is connected with a lateral grouting pump, a plurality of high-pressure grout outlets are respectively arranged on the outer sides of the lateral grouting vertical pipe, which are opposite to the upper section and the lower section of the coarse particle soil layer, and a high-pressure valve is arranged on each high-pressure grout outlet; the lateral mud jacking standpipe is provided with a plurality of low-pressure grout outlets on the outer side opposite to the middle section of the coarse particle soil layer, and each low-pressure grout outlet is provided with a low-pressure valve.
In order to optimize the technical scheme, the specific measures adopted further comprise:
furthermore, the drilling slag filtering device comprises a drilling slag pool, one end of the drilling slag conveying pipe extends into the drilling slag pool, a filter screen is arranged at the bottom of the drilling slag pool, and the filter screen is positioned above the mud sedimentation pool; the drilling slag slurry conveyed from the drilling slag conveying pipe is filtered by a filter screen to leave coarse-particle drilling slag in a drilling slag pool, and fine-particle drilling slag falls into a mud sedimentation pool through the filter screen; a winch is arranged above the slag drilling pool, a conveying belt is arranged above the winch, and one end of the conveying belt is provided with a coarse particle slag drilling pool; the coarse-particle drilling slag in the drilling slag pool can be lifted to a conveying belt by a winch and is conveyed into the coarse-particle drilling slag pool through the conveying belt.
Furthermore, the other end of the drilling slag conveying pipe extends into the pile hole, and a drilling slag circulating pump is arranged on the outer side of the drilling slag conveying pipe; the pile hole is formed by drilling a hole-forming drilling tool step by step driven by a hole-forming power machine.
Furthermore, lower floor's solidification mud ring is the annular tubular structure with upper strata solidification mud ring, every the equal angle in outside of annular tube just divides to be equipped with a plurality of towards the play thick grain soil layer hole that corresponds the coarse grain soil layer, every the drill way department equipartition of going out the thick liquid hole has been put the shutoff to prevent that external debris from getting into in two annular tubes when not going out the thick liquid.
Furthermore, a plurality of groups of lateral mud jacking vertical pipes are uniformly distributed along the periphery of the cast-in-place pile at equal angles, and each group of lateral mud jacking vertical pipes are positioned on the inner sides of the annular walls of the lower layer solidified mud ring and the upper layer solidified mud ring; the low-pressure valve and the high-pressure valve on the lateral grouting standpipe are all one-way valves, and after the cement slurry pressure in the lateral grouting standpipe reaches a certain pressure, the cement slurry can be sequentially pressed out of the low-pressure valve and the high-pressure valve along with the rise of the pressure.
Further, with the position department adjacent to the bored concrete pile still is equipped with the exploratory hole that runs through the coarse grain soil layer downwards, the downthehole probe that is equipped with of exploratory, there is the monitor the upside of probe through cable connection, the probe is used for surveying whether solidification mud permeates the degree of depth department that corresponds in the exploratory hole from the gap on coarse grain soil layer.
The invention also discloses a grouting construction method based on the grouting system, which comprises the following steps:
s1, turning on the drilling slag circulating pump, sucking drilling slag slurry waste generated by construction in the pile hole into a drilling slag pool through a drilling slag conveying pipe, and separating the drilling slag slurry waste into coarse-particle drilling slag and fine-particle slurry through the filter screen, wherein the fine-particle slurry falls into a slurry sedimentation tank;
s2, opening the solidification slurry pump and closing an output port of the solidification slurry pump, sucking fine particle slurry in a slurry sedimentation tank into a pump cavity through a slurry conveying pipe, injecting cement into the pump cavity according to a certain proportion, and fully mixing and stirring the fine particle slurry and the cement to form solidified slurry;
s3, opening two output ports of the solidification slurry pump, and respectively pumping the stirred solidification slurry into gaps of the coarse-particle soil layer through the lower solidification slurry ring and the upper solidification slurry ring; simultaneously monitoring a probe in the probe hole, closing a curing slurry pump after the curing slurry permeates to the preset height of the probe hole, stopping pressing the curing slurry in the probe hole and standing for 24 hours;
s4, after the solidified slurry is initially set, opening the lateral grouting pump to press the cement slurry into a lateral grouting vertical pipe, so that the cement slurry is sequentially pressed out from a low-pressure valve and a high-pressure valve after reaching a certain pressure, and filling gaps in a coarse-particle soil layer reinforced by the solidified slurry;
and S5, after the pressure or the pressing amount of the cement paste reaches a preset target, closing the lateral grouting pump and stopping grouting construction.
In order to optimize the technical scheme, the specific measures adopted further comprise:
further, the following steps are added before step S2: and opening the winch, lifting the coarse grain drilling slag to a conveying belt through the winch, and conveying the coarse grain drilling slag to a coarse grain drilling slag pool by the conveying belt for storage.
The invention has the beneficial effects that:
1. the invention recycles the drilling slag and mud waste generated in the construction process of the cast-in-situ bored pile; the waste slurry is separated into fine particle slurry and coarse particle drilling slag when the pile foundation is formed into the holes through a separation measure, wherein the solidified slurry formed after the fine particle slurry is mixed with cement can be used for solidifying a coarse particle soil layer, and the coarse particle drilling slag can be used for engineering filling such as a roadbed and the like or directly used for concrete aggregate, so that the cost for treating and transporting pile foundation construction waste is effectively reduced.
2. The invention can realize the mud jacking solidification of the coarse-grained soil layer on the pile side; the solidified slurry is pressed into a coarse particle soil layer to perform the functions of cementation and filling compaction, and the escape channel of the slurry is blocked. On the basis, cement paste is pressed into a coarse-particle soil layer reinforced by solidified mud, small gaps in the soil layer are filled, and the application of the pile foundation post-grouting technology in the coarse-particle soil layer is realized.
3. The method can realize the high-quality coarse particle soil layer reinforcing effect; the upper and lower layers of annular solidified slurry are annularly arranged on the interface of a coarse particle soil layer, the solidified slurry can be pressed in a large range in a low-pressure permeation mode, and the solidified slurry reinforcing effect can be monitored through probes in peripheral probe holes. Meanwhile, the low-pressure valve is arranged in the middle section of the lateral grouting standpipe, and the high-pressure valve is arranged at the upper end and the lower end of the lateral grouting standpipe, so that cement slurry can be relatively uniformly diffused in a coarse particle soil layer in the grouting process, and the construction effect is ensured.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;
fig. 3 is a schematic cross-sectional view at B-B in fig. 1.
The label names in the figure: the device comprises a cast-in-place pile 1, a lower-layer solidified slurry ring 2, a lower-layer solidified slurry vertical pipe 3, an upper-layer solidified slurry ring 4, an upper-layer solidified slurry vertical pipe 5, a lateral mud jacking vertical pipe 6, a lateral mud jacking pump 7, a circumferential solidified mud pump 8, a slurry conveying pipe 9, a slurry sedimentation tank 10, a drilling slag tank 11, a drilling slag conveying pipe 12, a pile hole 13, a pore-forming drilling tool 14, a pore-forming power machine 15, a wall protection slurry pipeline 16, a wall protection slurry preparation tank 17, a monitor 18, a cable 19, a probe 20, a probing hole 21, a conveying belt 22, a winch 23, a coarse particle drilling slag tank 24, a coarse particle soil layer 25, a high-pressure valve 26 and a low-pressure valve 27.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings.
It should be noted that the terms "upper", "lower", "left", "right", "front", "back", etc. used in the present invention are for clarity of description only, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not limited by the technical contents of the essential changes.
The first embodiment:
referring to fig. 1, a pile foundation post-grouting system based on drilling slag recycling of this embodiment includes: the device comprises a drilling slag conveying pipe 12, a drilling slag filtering device, a mud sedimentation tank 10, a mud conveying pipe 9, a circumferential solidification mud pump 8, a solidified mud layered pressure feeding device and a lateral pressure mud device; the solidified slurry layered pressure feeding device is matched with the lateral grouting device and is used for grouting and solidifying the pile side coarse particle soil layer.
In the embodiment, one side of the drilling slag filtering device is connected with a drilling slag conveying pipe 12, and the mud sedimentation tank 10 is arranged at the lower side of the drilling slag filtering device; the drilling slag filtering device is used for filtering and separating drilling slag and slurry conveyed in the drilling slag conveying pipe 12, wherein the slurry with smaller particle size is recycled to the slurry sedimentation tank 10; one end of the slurry conveying pipe 9 extends into the slurry sedimentation tank 10, and the other end of the slurry conveying pipe is connected with the annular solidification slurry pump 8;
the solidification slurry pump 8 is provided with two output ports, the solidification slurry layered pressure feeding device comprises a lower solidification slurry vertical pipe 3 and an upper solidification slurry vertical pipe 5, one end of the lower solidification slurry vertical pipe 3 is connected with one output port of the solidification slurry pump 8, and the other end of the lower solidification slurry vertical pipe 3 is connected with a lower solidification slurry ring 2 which is communicated with the lower solidification slurry vertical pipe and is provided with a hollow inner cavity; one end of the upper layer solidified slurry vertical pipe 5 is connected with the other output port of the solidified slurry pump 8, and the other end of the upper layer solidified slurry vertical pipe 5 is connected with an upper layer solidified slurry ring 4 which is communicated with the upper layer solidified slurry vertical pipe and is provided with a hollow inner cavity; the lower layer solidified slurry ring 2 and the upper layer solidified slurry ring 4 are both positioned in the cast-in-place pile 1, the lower layer solidified slurry ring 2 is arranged at the lower section position of the coarse particle soil layer 25, and the upper layer solidified slurry ring 4 is arranged at the upper section position of the coarse particle soil layer 25; and the annular walls of the lower layer solidified slurry ring 2 and the upper layer solidified slurry ring 4 are provided with slurry outlet holes facing the coarse particle soil layer 25.
When in use, the solidification slurry pump 8 sucks fine particle slurry in the slurry sedimentation tank 10 into a pump cavity through the slurry conveying pipe 9, and then the fine particle slurry is mixed and stirred with cement according to a certain proportion; the uniformly stirred solidified slurry is pumped to a lower solidified slurry ring 2 through a lower solidified slurry vertical pipe 3, pumped to an upper solidified slurry ring 4 through an upper solidified slurry vertical pipe 5, and the solidified slurry in the lower solidified slurry ring 2 and the upper solidified slurry ring 4 is pumped to a gap at a position corresponding to a coarse particle soil layer 25.
The lateral grouting device comprises a lateral grouting vertical pipe 6 vertically arranged in the cast-in-place pile 1, the top end of the lateral grouting vertical pipe 6 is connected with a lateral grouting pump 7, the lateral grouting vertical pipe 6 is respectively provided with a plurality of high-pressure grout outlets on the outer sides opposite to the upper section and the lower section of the coarse particle soil layer 25, and each high-pressure grout outlet is provided with a high-pressure valve 26; the lateral mud jacking standpipe 6 is provided with a plurality of low-pressure grout outlets at the outer side opposite to the middle section of the coarse particle soil layer 25, and each low-pressure grout outlet is provided with a low-pressure valve 27.
When the lateral grouting device is used, after the solidified slurry is initially set, the lateral grouting pump 7 is opened to press the cement slurry into the lateral grouting vertical pipe 6, and after the cement slurry reaches a certain pressure, the cement slurry is sequentially pressed out of the low-pressure valve 27 and the high-pressure valve 26 along with the rise of the pressure, so that gaps in the coarse particle soil layer 25 reinforced by the solidified slurry are filled.
In the embodiment, the drilling slag filtering device comprises a drilling slag pool 11, one end of a drilling slag conveying pipe 12 extends into the drilling slag pool 11, a filter screen is arranged at the bottom of the drilling slag pool 11 and is positioned above the mud sedimentation tank 10; the drilling slag and the slurry conveyed from the drilling slag conveying pipe 12 pass through a filter screen to leave coarse-particle drilling slag in the drilling slag pool 11, and fine-particle slurry falls into the slurry sedimentation pool 10 through the filter screen; a winch 23 is arranged above the slag drilling pool 11, a conveyer belt 22 is arranged above the winch 23, and one end of the conveyer belt 22 is provided with a coarse particle slag drilling pool 24; the coarse-grained drilling slag in the drilling slag pool 11 can be lifted to the conveyer belt 22 by the winch 23 and is conveyed into the coarse-grained drilling slag pool 24 through the conveyer belt 22, and the drilling slag in the coarse-grained drilling slag pool 24 can be used for engineering filling such as roadbed and the like or can be directly used for concrete aggregate.
In this embodiment, the other end of the drilling slag conveying pipe 12 extends into the pile hole 13, and a drilling slag circulating pump is further arranged outside the drilling slag conveying pipe 12 and used for circularly sucking drilling slag waste generated by construction in the pile hole 13 into the drilling slag pool 11; wherein, the pile hole 13 is formed by drilling and forming gradually by a hole-forming power machine 15 driving a hole-forming drilling tool 14; in the process of pore-forming construction, the wall-protecting slurry in the wall-protecting slurry preparation pool 17 enters the pile hole 13 through the wall-protecting slurry pipeline 16.
Referring to fig. 2-3, the lower layer of solidified slurry ring 2 and the upper layer of solidified slurry ring 4 are both annular tubular structures, the outer side of each annular pipe has an equal angle and is respectively provided with a plurality of slurry outlet holes facing the corresponding coarse particle soil layer 25, and the orifice of each slurry outlet hole is provided with a plug to prevent external impurities from entering the two annular pipes when slurry is not discharged.
In the embodiment, a plurality of groups of lateral mud jacking vertical pipes 6 are uniformly distributed along the periphery of the cast-in-place pile 1 at equal angles, and each group of lateral mud jacking vertical pipes 6 are positioned on the inner sides of the annular walls of the lower layer solidified mud ring 2 and the upper layer solidified mud ring 4; the low-pressure valve 27 and the high-pressure valve 26 on the lateral mud jacking standpipe 6 are all one-way valves.
In this embodiment, a probing hole 21 penetrating through the coarse-grained soil layer 25 downward is further formed in a position adjacent to the cast-in-place pile 1, a probe 20 is arranged in the probing hole 21, the upper side of the probe 20 is connected with a monitor 18 through a cable 19, and the probe 20 is used for detecting whether the solidified slurry permeates into the probing hole 21 from a gap of the coarse-grained soil layer 25 or not, so as to determine whether the solidified slurry is completely diffused and filled into the gap around the coarse-grained soil layer 25 or not.
Second embodiment:
in order to make the technical scheme of the present invention more clear and complete, the present embodiment further provides a grouting construction method based on the grouting system, which specifically includes the following steps,
step S1, turning on a drilling slag circulating pump, sucking drilling slag slurry waste generated by construction in the pile hole 13 into a drilling slag pool 11 through a drilling slag conveying pipe 12, and separating the drilling slag slurry waste into coarse-particle drilling slag and fine-particle slurry through a filter screen, wherein the fine-particle slurry falls into a slurry sedimentation tank 10;
step S2, opening the solidification slurry pump 8 and closing the output port thereof, sucking the fine particle slurry in the slurry sedimentation tank 10 into the pump cavity through the slurry conveying pipe 9 and injecting cement into the pump cavity according to a certain proportion, and fully mixing and stirring the slurry and the cement to form solidified slurry;
step S3, opening two output ports of the solidification slurry pump 8, and respectively pumping the stirred solidification slurry into the gap of the coarse particle soil layer 25 through the lower solidification slurry ring 2 and the upper solidification slurry ring 4; simultaneously monitoring the probe 20 in the probe hole 21, stopping the curing slurry pump 8 and standing for 24 hours after the curing slurry permeates to the preset height of the probe hole;
step S4, after the solidified slurry is initially set, opening a lateral grouting pump 7 to press the cement slurry into a lateral grouting standpipe 6, pressing the cement slurry out of a low-pressure valve 27 and a high-pressure valve 26 in sequence after the cement slurry reaches a certain pressure, and filling gaps in a coarse particle soil layer 25 which is reinforced by the solidified slurry;
and step S5, after the pressure or the pressing amount of the cement paste reaches a preset target, closing the lateral grouting pump 7 and stopping grouting construction.
Preferably, the following steps are added before step S2: the winch 23 is opened, the coarse grain drilling slag is lifted to the conveyer belt 22 through the winch 23, and the coarse grain drilling slag is conveyed to the coarse grain drilling slag pool 24 by the conveyer belt 22 to be stored; according to the actual requirement of a construction site, coarse-grained drilling slag is applied to roadbed filling or concrete aggregate.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.
Claims (8)
1. The utility model provides a slip casting system behind pile foundation based on sediment recycle which characterized in that includes: the device comprises a drilling slag conveying pipe (12), a drilling slag filtering device, a mud sedimentation tank (10), a mud conveying pipe (9), a circumferential solidification mud pump (8), a solidification mud layering pressure feeding device and a lateral pressure mud device;
one side of the drilling slag filtering device is connected with a drilling slag conveying pipe (12), and the mud sedimentation tank (10) is arranged at the lower side of the drilling slag filtering device; the drilling slag conveying pipe (12) conveys the drilling slag and the slurry waste to a drilling slag filtering device for filtering and separating, wherein the fine particle slurry with smaller particle size can fall into a slurry sedimentation tank (10); one end of the slurry conveying pipe (9) extends into the slurry sedimentation tank (10), and the other end of the slurry conveying pipe is connected with the annular solidification slurry pump (8); the solidification slurry pump (8) has two output ports;
the solidified mud layered pressure feeding device comprises a lower-layer solidified mud vertical pipe (3) and an upper-layer solidified mud vertical pipe (5), one end of the lower-layer solidified mud vertical pipe (3) is connected with one output port of a solidified mud pump (8), and the other end of the lower-layer solidified mud vertical pipe (3) is connected with a lower-layer solidified mud ring (2) which is communicated with the lower-layer solidified mud vertical pipe and is provided with a hollow inner cavity; one end of the upper layer solidified slurry vertical pipe (5) is connected with the other output port of the solidified slurry pump (8), and the other end of the upper layer solidified slurry vertical pipe (5) is connected with an upper layer solidified slurry ring (4) which is communicated with the upper layer solidified slurry vertical pipe and is provided with a hollow inner cavity; the lower layer solidified slurry ring (2) and the upper layer solidified slurry ring (4) are both positioned in the cast-in-place pile (1), the lower layer solidified slurry ring (2) is arranged at the lower section position of the coarse particle soil layer (25), and the upper layer solidified slurry ring (4) is arranged at the upper section position of the coarse particle soil layer (25); slurry outlet holes are formed in the outer side annular walls of the lower layer solidified slurry ring (2) and the upper layer solidified slurry ring (4), and the orifice of each slurry outlet hole corresponds to the coarse particle soil layer (25);
the lateral grouting device comprises a lateral grouting vertical pipe (6) vertically arranged in the cast-in-place pile (1), the top end of the lateral grouting vertical pipe (6) is connected with a lateral grouting pump (7), the lateral grouting vertical pipe (6) is respectively provided with a plurality of high-pressure grout outlets on the outer sides opposite to the upper section and the lower section of the coarse particle soil layer (25), and each high-pressure grout outlet is provided with a high-pressure valve (26); the lateral mud jacking standpipe (6) is equipped with a plurality of low pressure grout outlet with the relative outside in coarse grain soil layer (25) middle section, every all be equipped with low pressure valve (27) on the low pressure grout outlet.
2. The pile foundation post-grouting system based on drilling slag recycling is characterized in that the drilling slag filtering device comprises a drilling slag pool (11), one end of the drilling slag conveying pipe (12) extends into the drilling slag pool (11), a filtering net is arranged at the bottom of the drilling slag pool (11), and the filtering net is positioned above the mud sedimentation tank (10); the drilling slag slurry conveyed from the drilling slag conveying pipe (12) is filtered by a filter screen to leave coarse-particle drilling slag in a drilling slag pool (11), and fine-particle drilling slag falls into a mud sedimentation pool (10) through the filter screen; a winch (23) is arranged above the slag drilling pool (11), a conveying belt (22) is arranged above the winch (23), and a coarse particle slag drilling pool (24) is arranged at one end of the conveying belt (22); coarse-grained drilling slag in the drilling slag pool (11) can be lifted to a conveyer belt (22) by a winch (23) and is conveyed into a coarse-grained drilling slag pool (24) through the conveyer belt (22).
3. The pile foundation post-grouting system based on drilling slag recycling is characterized in that the other end of the drilling slag conveying pipe (12) extends into a pile hole (13), and a drilling slag circulating pump is arranged outside the drilling slag conveying pipe (12); wherein, the pile hole (13) is formed by drilling and forming gradually by a hole-forming power machine (15) driving a hole-forming drilling tool (14).
4. The pile foundation post-grouting system based on drilling slag recycling is characterized in that the lower layer solidified slurry ring (2) and the upper layer solidified slurry ring (4) are both of annular tubular structures, a plurality of slurry outlet holes facing to a corresponding coarse particle soil layer (25) are arranged on the outer sides of the annular pipes at equal angles and in a distributed mode, and a plug is arranged at the opening of each slurry outlet hole to prevent external impurities from entering the two annular pipes when slurry is not discharged.
5. The pile foundation post-grouting system based on drilling slag recycling is characterized in that the lateral mud jacking risers (6) are uniformly arranged in multiple groups at equal angles along the periphery of the cast-in-place pile (1), and each group of the lateral mud jacking risers (6) is positioned on the inner side of the annular wall of the lower layer of solidified mud ring (2) and the upper layer of solidified mud ring (4); low pressure valve (27), high-pressure valve (26) on side direction mud jacking standpipe (6) are the check valve, after the grout hydraulic pressure in side direction mud jacking standpipe (6) reached certain pressure, can follow the rising of pressure and extrude in low pressure valve (27), high-pressure valve (26) in proper order.
6. The pile foundation post-grouting system based on drilling slag recycling is characterized in that a probe hole (21) penetrating through a coarse particle soil layer (25) downwards is further formed in a position adjacent to the cast-in-place pile (1), a probe (20) is arranged in the probe hole (21), the upper side of the probe (20) is connected with a monitor (18) through a cable (19), and the probe (20) is used for detecting whether solidified slurry penetrates into the probe hole (21) from a gap of the coarse particle soil layer (25) to a corresponding depth.
7. A grouting construction method based on the grouting system of claim 6, characterized by comprising the following steps:
s1, turning on the drilling slag circulating pump, sucking drilling slag mud waste generated by construction in the pile hole (13) into a drilling slag pool (11) through a drilling slag conveying pipe (12), and separating the drilling slag mud waste into coarse-particle drilling slag and fine-particle mud through the filter screen, wherein the fine-particle mud falls into a mud sedimentation pool (10);
s2, opening the solidification slurry pump (8) and closing an output port of the solidification slurry pump, sucking the fine particle slurry in the slurry sedimentation tank (10) into a pump cavity through the slurry conveying pipe (9), injecting cement into the pump cavity according to a certain proportion, and fully mixing and stirring the fine particle slurry and the cement to form solidification slurry;
s3, opening two output ports of the solidification slurry pump (8), and respectively pumping the stirred solidification slurry into gaps of the coarse particle soil layer (25) through the lower solidification slurry ring (2) and the upper solidification slurry ring (4); simultaneously monitoring a probe (20) in the probe hole (21), closing a curing slurry pump (8) when the curing slurry permeates to the preset height of the probe hole, stopping pressing the curing slurry and standing for 24 hours;
s4, after the solidified mud is initially set, opening the lateral grouting pump (7) to press the cement slurry into the lateral grouting vertical pipe (6), so that the cement slurry is pressed out from the low-pressure valve (27) and the high-pressure valve (26) in sequence after reaching a certain pressure, and gaps in the coarse-particle soil layer (25) are filled after the solidified mud is reinforced;
and S5, after the pressure or the pressing amount of the cement paste reaches a preset target, closing the lateral grouting pump (7) and stopping grouting construction.
8. The grouting construction method according to claim 7, wherein the following steps are added before step S2: and opening the winch (23), lifting the coarse grain drilling slag to a conveyer belt (22) through the winch (23), and conveying the coarse grain drilling slag to a coarse grain drilling slag pool (24) by the conveyer belt (22) for storage.
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Effective date of registration: 20220324 Address after: 211164 No. 13, Xinggu Road, Guli street, Jiangning District, Nanjing City, Jiangsu Province Applicant after: NANJING EAST LAND CONSTRUCTION TECHNOLOGY CO.,LTD. Applicant after: NANJING DONGDAZI BALANCE PILE TESTING Co.,Ltd. Address before: 211164 No. 13, Xinggu Road, Guli street, Jiangning District, Nanjing City, Jiangsu Province Applicant before: NANJING EAST LAND CONSTRUCTION TECHNOLOGY CO.,LTD. |
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