CN106884443B - The construction method for grouting reinforcement that foundation bottom is come to nothing - Google Patents

The construction method for grouting reinforcement that foundation bottom is come to nothing Download PDF

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Publication number
CN106884443B
CN106884443B CN201710143253.8A CN201710143253A CN106884443B CN 106884443 B CN106884443 B CN 106884443B CN 201710143253 A CN201710143253 A CN 201710143253A CN 106884443 B CN106884443 B CN 106884443B
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grouting
construction
slip casting
basis
foundation
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CN201710143253.8A
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CN106884443A (en
Inventor
王代发
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China 22MCC Group Corp Ltd
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China 22MCC Group Corp Ltd
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D37/00Repair of damaged foundations or foundation structures
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2250/00Production methods
    • E02D2250/003Injection of material
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00Materials
    • E02D2300/0004Synthetics
    • E02D2300/0018Cement used as binder
    • E02D2300/0023Slurry

Abstract

The present invention relates to a kind of construction method for grouting reinforcement that foundation bottom is come to nothing, and require according to job specfication, and ground line is released in measurement, release and need to pick the size that chisel removes basis;Surface of base cutting is carried out, according to the new equipment basis of process normal construction reconstruction;Grouting Pipe is made, buries as requested, carries out slip casting protection of pipe;Earthwork compaction in layers backfill;Continue basic Superstructure Construction, to region carries out slip casing by pressure the defects of crack, collapsing, hollowing under the original basis below of entire closing basis;The extra Grouting Pipe of exposed surface of base is cut, is blocked, surface reconditioning.The construction method for grouting reinforcement that foundation bottom of the present invention is come to nothing, basic grouting behind shaft or drift lining of first constructing, foundation construction can be accelerated;Confined pressure slip casting, slip casting effect is significant, and quality is guaranteed;Avoid structure construction and grouting with plunger cross-operation;Process flow is simple, and worker is easily operated;It draws materials to injecting paste material, saves construction cost, improve construction efficiency.

Description

The construction method for grouting reinforcement that foundation bottom is come to nothing
Technical field
The present invention relates to a kind of construction methods of concrete foundation processing, in particular to a kind of foundation bottom is de- Empty construction method for grouting reinforcement.
Background technique
Currently, the limitation with country to some excess capacity projects, advocates low-carbon environment-friendly, energy-saving and emission-reduction, green energetically Construction, therefore numerous items must not be without technique adjustment or upgrading, it is necessary to certain equipment bases on production line Plinth carries out technological transformation, meets prior art requirement.During basic technological transformation, often a part is to remove original equipment basis top, It takes bar planting or is attached mode with original basis bar splicing and reconstruct, and many deeper bases generally require whole dismountings (saturating) original equipment sole plate is drilled through, that is, opening up reserved construction hole in original basis upper plate, construction is new basic again, It is connected to form new Equipment Foundations with original basis again.It however is all to be carried out using mechanical when picking chisel and removing large equipment base (Hydraulic pick or pneumatic pick, electric pick etc.), the vibration at this moment generated often make ground beneath near surrounding earthwork collapsing occur, split Seam, the bottom of foundation come to nothing, hollowing phenomena such as, and transformation elementary process in vibration will also result in the surrounding soil body landslide, sedimentation Situations such as, the especially soil properties such as such as mud are in bad order, even more serious when level of ground water is higher.When new foundation construction finishes back The earthwork filled out cannot make original basis bottom closely knit, can not also tamp, even if foundation pit has gib measure, the soil body also can be right Supporting construction generate lateral pressure, cause sole plate to come to nothing, and cause foundation bearing capacity deficiency influence structure using safe.
Summary of the invention
In view of the deficiency of the prior art, it is simple to provide a kind of process flow by the present invention, easy for construction, improves construction Efficiency reduces construction cost, guarantees the construction method for grouting reinforcement that the foundation bottom of construction quality is come to nothing.
The technical solution used in the present invention is:
A kind of construction method for grouting reinforcement that foundation bottom is come to nothing, includes the following steps:
Step 1: ground line is released in measurement, and then releasing in original basis needs according to design drawing and job specfication requirement Pick the size that chisel is removed;
Step 2: being cut with grinding wheel or toothless saw according to pay-out rule little progress row surface of base, with mechanical-hydraulic pick to base Plinth carries out protective demolition;
Step 3: according to the new equipment basis of process normal construction reconstruction;
Step 4: Equipment Foundations health, form removable cleaning;
Step 5: production Grouting Pipe, buries as requested, carries out slip casting protection of pipe;
Step 6: earthwork compaction in layers backfills;
Step 7: continuing basic Superstructure Construction, it is whole that face progress is removed with original equipment basis in basis as required Body connection closure;
Step 8: to region carries out pressure note the defects of crack, collapsing, hollowing under the original basis below of entire closing basis Slurry;
Step 9: being cut to the extra Grouting Pipe of exposed surface of base, block, surface reconditioning.
The slip casing by pressure uses cement slurry.
The Grouting Pipe upper end is connected region welding steel seal ring with basis.
The slip casting includes the following steps:
1, pump line is connected;
Grouting pump one end is connect with Grouting Pipe, is fixed and tightens with thin wire and Grouting Pipe, prevents slip casting during slip casting Pipe jumps de-;The other end is connect with pulp storage tank below blender, protrudes into pipe port dense mesh or filter screen packet in pulp storage tank Firmly;
2, cement slurry is made;
Mechanical stirring is carried out with blender, the ratio of mud controls between 1:1~0.65:1;
A certain amount of water is first added into blender, is subsequently poured into cement, finally adds water sequence, stirs 3-5 bags of water every time Mud, mixing time are controlled at 5 minutes or so;
3, turn on pump starts slip casting;
Starting grouting pump starts slip casting, grouting pump is adjusted to low grade when starting slip casting, by grouting pump when slurries flowing is smooth It is adjusted to top grade, pays attention to observing the pressure of slip casting table and the torsional deformation of slip casting hose;
4, pressure stabilizing, end slip casting;
Gage pressure tends towards stability and reaches design pressure, terminates slip casting.Adjacent hole or injected hole are found during slip casting There is slurries spilling in surrounding hole and crack, to block in time, block and stop slip casting without effect.First time grouting serous fluid will initial set When should carry out second or third time mend slurry.
The present invention compared with the prior art the utility model has the advantages that
The construction method for grouting reinforcement that foundation bottom of the present invention is come to nothing does not use rear bored grouting and buries Grouting Pipe in advance To original basis bottom plate come to nothing phenomenon, the soil body collapse loosen, crack in a manner of filling, permeate and is compacted etc., is driven by slip casing by pressure The moisture and gas in the crack of stratum or between soil particle are walked, and fills its position, the soil body is cemented to an entirety after hardening, from And ground is reinforced, the in addition slip casing by pressure (under being equivalent to enclosed environment) under the closing of entire sole plate, so that slip casting Effect greatly improves.Secondly Grouting Pipe tip, which also can be inserted into the soil layer of lower section, solves since working space is narrow, and basis is removed disconnected Face is irregular, the backfill earthwork can not cal rolling it is closely knit and roll less than region so that entire the old and new basis surrounding slip casting A closed veneer is formed after hardening, plays the role of water-stop curtain.
The construction method for grouting reinforcement that foundation bottom of the present invention is come to nothing, basic grouting behind shaft or drift lining of first constructing, foundation construction can add Fastly;Confined pressure slip casting, slip casting effect is significant, and quality is guaranteed;Avoid structure construction and grouting with plunger cross-operation;Technique Process is simple, and worker is easily operated;It draws materials to injecting paste material, saves construction cost, improve construction efficiency.
Detailed description of the invention
The structural schematic diagram for the construction method for grouting reinforcement that Fig. 1 foundation bottom of the present invention is come to nothing;
Fig. 2 is the original basis diagrammatic cross-section for the construction method for grouting reinforcement that foundation bottom of the present invention is come to nothing;
Fig. 3 is that the original basis for the construction method for grouting reinforcement that foundation bottom of the present invention is come to nothing removes the signal of earth excavation section Figure;
Fig. 4 is that the basis reconstruction Grouting Pipe for the construction method for grouting reinforcement that foundation bottom of the present invention is come to nothing buries section signal Figure;
Fig. 5 is the grouting and reinforcing zone profile schematic diagram for the construction method for grouting reinforcement that foundation bottom of the present invention is come to nothing.
Main component symbol description in attached drawing:
In figure:
1, basis 2, original basis 3, blinding layer 4, connection reinforcing bar 5, Grouting Pipe 6, steel plate water-stopping ring 7, slurry are created Liquid perforation 8, injection slurry
9, lower part foundation soil
10, original basis bottom plate comes to nothing region, loose region, crack area, settling zone
11, not firm region, narrow space region are backfilled.
Specific embodiment
Referring to the drawings and embodiment the present invention will be described in detail:
Attached drawing 1-5 it is found that
A kind of construction method for grouting reinforcement that foundation bottom is come to nothing,
Step 1: ground line is released in measurement, and then releasing in original basis needs according to design drawing and job specfication requirement Pick the size that chisel is removed;
Step 2: cut with grinding wheel or toothless saw according to pay-out rule little progress row surface of base, it is (hydraulic with mechanical-hydraulic pick Hammer or pneumatic pick) protective demolition is carried out to basis;Whether retain reinforcing bar in basis according to design requirement, is such as not necessarily to reservation gas welding It directly slices off, manual cleaning removes building waste in surface of base and foundation pit;
Step 3: according to the new equipment basis of process normal construction reconstruction;That is: the binding of earth excavation → bed course → reinforcing bar → Form for seal → concreting;
Step 4: Equipment Foundations health, form removable cleaning;
Step 5: production Grouting Pipe, buries as requested, carries out slip casting protection of pipe;
Common 4 steel splitting pipe: Φ 22mm can be used in Grouting Pipe;Slip casting pipe range is determined according to parameters such as original basis bottom depth The effective toothless saw of slip casting is cut into certain length by degree, and tip is pounded tapered with sledgehammer, and apart from tip, certain distance starts up Ф 5mm slip casting hole is set around spacing;Upper end is connected region (basis or terrace in) welding steel seal ring with basis.Note Effective mechanical (or sledgehammer) is starched to squeeze into the soil layer of original basis lower part to be treated;
Step 6: basic surrounding earthwork compaction in layers backfill;
Step 7: continuing basic Superstructure Construction, it is whole that face progress is removed with original equipment basis in basis as required Body connection closure;
Step 8: being carried out to entire the defects of closing crack, collapsing, hollowing under basic (ground) original basis below region Slip casing by pressure, improving improves foundation bearing capacity.
Slip casting step:
1, pump line is connected;
Grouting pump one end and steel (are penetrated) pipe to connect, tightened with thin wire and steel pipe binding, prevent slip casting during slip casting Pipe jumps de-;The other end is connect with pulp storage tank below blender, protrudes into pipe port dense mesh or filter screen packet in pulp storage tank Firmly;
2, cement slurry is made;
Mechanical stirring is carried out with blender, the ratio of mud controls between 1:1~0.65:1;
A certain amount of water is first added into blender, is subsequently poured into cement, adds water sequence, stirs 3-5 bags of cement every time, stir Time control is mixed at 5 minutes or so;
Cement uses 32.5# ordinary portland cement;
3, turn on pump starts slip casting;
Starting grouting pump starts slip casting, grouting pump is adjusted to low grade when starting slip casting, by grouting pump when slurries flowing is smooth It is adjusted to top grade, pays attention to observing the pressure of slip casting table and the torsional deformation of slip casting hose;
4, pressure stabilizing, end slip casting
Gage pressure tends towards stability and reaches design pressure, terminates slip casting.Adjacent hole or injected hole are found during slip casting There is slurries spilling in surrounding hole and crack, to block in time, block and stop slip casting without effect.First time grouting serous fluid will initial set When should carry out second or third time mend slurry;
Step 9: being cut to the extra Grouting Pipe of exposed surface of base, block, surface reconditioning
Process flow: surveying setting-out (picking chisel line in basis) → basis cutting, dismounting, cleaning → newly-built foundation construction → is supported Raw, form removable → Grouting Pipe production, connect closing → pressure with original basis at embedded → backfilling of earthwork → top foundation structure construction Power slip casting → slip casting terminates, cutting blocks.
It is basic grouting behind shaft or drift lining of first constructing, foundation construction can be accelerated;Confined pressure slip casting, slip casting effect is significant, quality It is guaranteed;It is carried out after slip casting, avoids structure construction and grouting with plunger cross-operation;Process flow is simple, and worker is easily operated;Note Pulp material (steel pipe, cement) is gathered materials on the spot, and buying, save the cost are easy.
The construction method for grouting reinforcement that foundation bottom of the present invention is come to nothing does not use rear bored grouting and buries Grouting Pipe in advance To original basis bottom plate come to nothing phenomenon, the soil body collapse loosen, crack in a manner of filling, permeate and is compacted etc., is driven by slip casing by pressure The moisture and gas in the crack of stratum or between soil particle are walked, and fills its position, the soil body is cemented to an entirety after hardening, from And ground is reinforced, the in addition slip casing by pressure (under being equivalent to enclosed environment) under the closing of entire sole plate, so that slip casting Effect greatly improves.Secondly Grouting Pipe tip, which also can be inserted into the soil layer of lower section, solves since working space is narrow, and basis is removed disconnected Face is irregular, the backfill earthwork can not cal rolling it is closely knit and roll less than region so that entire the old and new basis surrounding slip casting A closed veneer is formed after hardening, plays the role of water-stop curtain.
The construction method for grouting reinforcement that foundation bottom of the present invention is come to nothing, basic grouting behind shaft or drift lining of first constructing, foundation construction can add Fastly;Confined pressure slip casting, slip casting effect is significant, and quality is guaranteed;Avoid structure construction and grouting with plunger cross-operation;Technique Process is simple, and worker is easily operated;It draws materials to injecting paste material, saves construction cost, improve construction efficiency.
The above described is only a preferred embodiment of the present invention, not making in any form to structure of the invention Limitation.Any simple modification, equivalent change and modification to the above embodiments according to the technical essence of the invention, Belong within the scope of technical solution of the present invention.

Claims (4)

1. a kind of construction method for grouting reinforcement that foundation bottom is come to nothing, which is characterized in that
Step 1: ground line is released in measurement according to design drawing and job specfication requirement, is then released in original basis and need to pick Dig the size removed;
Step 2: cut with grinding wheel or toothless saw according to pay-out rule little progress row surface of base, with mechanical-hydraulic pick to basis into Row protective demolition;
Step 3: according to the new equipment basis of process normal construction reconstruction;
Step 4: Equipment Foundations health, form removable cleaning;
Step 5: production Grouting Pipe, buries as requested, carries out slip casting protection of pipe;
Step 6: earthwork compaction in layers backfills;
Step 7: continuing basic Superstructure Construction, face is removed into original equipment basis in basis as required and carries out whole connect Connect closure;
Step 8: carrying out slip casing by pressure to crack, collapsing, hollow imperfection region under the original basis below of entire closing basis;
Step 9: being cut to the extra Grouting Pipe of exposed surface of base, block, surface reconditioning.
2. the construction method for grouting reinforcement that foundation bottom is come to nothing according to claim 1, it is characterised in that: the slip casing by pressure Using cement slurry.
3. the construction method for grouting reinforcement that foundation bottom is come to nothing according to claim 1, it is characterised in that: in the Grouting Pipe Hold the region welding steel seal ring that is connected with basis.
4. the construction method for grouting reinforcement that foundation bottom is come to nothing according to claim 1, it is characterised in that: the slip casting includes Following steps:
(1), pump line is connected;
Grouting pump one end is connect with Grouting Pipe, is fixed and tightens with thin wire and Grouting Pipe, prevents Grouting Pipe during slip casting from jumping It is de-;The other end is connect with pulp storage tank below blender, and the pipe port protruded into pulp storage tank is encased with dense mesh or filter screen;
(2), cement slurry is made;
Mechanical stirring is carried out with blender, the ratio of mud controls between 1:1~0.65:1;
According to a certain amount of water is first added into blender, it is subsequently poured into cement, finally adds the sequence of water again, stirs 3-5 every time Bag cement, mixing time were controlled at 5 minutes;
(3), turn on pump starts slip casting;
Starting grouting pump starts slip casting, and grouting pump is adjusted to low grade when starting slip casting, and grouting pump is adjusted to by slurries flowing when smooth Top grade pays attention to observing the pressure of slip casting table and the torsional deformation of slip casting hose;
(4), pressure stabilizing, end slip casting;
Gage pressure tends towards stability and reaches design pressure, terminates slip casting;
Find that there is slurries spilling in hole and crack around adjacent hole or injected hole, block in time, block without effect during slip casting Stop slip casting;
First time grouting serous fluid will should carry out second or mend for the third time slurry when initial set.
CN201710143253.8A 2017-03-11 2017-03-11 The construction method for grouting reinforcement that foundation bottom is come to nothing Active CN106884443B (en)

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Publication number Priority date Publication date Assignee Title
CN109680722B (en) * 2019-01-24 2020-10-20 江苏南通三建集团股份有限公司 Construction method for directly reserving external building access port on basement outer wall

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CN101994324A (en) * 2010-12-22 2011-03-30 建研地基基础工程有限责任公司 Reinforced foundation and method for improving bending and shearing bearability of existing building rigid foundation
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CN103741963A (en) * 2014-01-06 2014-04-23 北京筑福国际工程技术有限责任公司 Industrial plant foundation strengthening method
KR20160107431A (en) * 2015-03-04 2016-09-19 윤종현 Underwater structure construction apparatus and construction method
CN105604340A (en) * 2015-12-28 2016-05-25 长春工程学院 Old house floor adding modifying method capable of improving seismic capacity and prolonging safe life

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