CN106759561B - One kind building/structures shallow foundation empty processing method - Google Patents
One kind building/structures shallow foundation empty processing method Download PDFInfo
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- CN106759561B CN106759561B CN201611252161.5A CN201611252161A CN106759561B CN 106759561 B CN106759561 B CN 106759561B CN 201611252161 A CN201611252161 A CN 201611252161A CN 106759561 B CN106759561 B CN 106759561B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D37/00—Repair of damaged foundations or foundation structures
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The present invention provides one kind and builds/structures shallow foundation empty processing method.The empty processing method is specifically to first pass through ground penetrating radar detection to come to nothing the area at position, and carry out subregion, spray-hole is drilled in each region of coming to nothing, then successively packing material is sprayed into each region of coming to nothing since the most marginal spray-hole in position of coming to nothing using concrete-spraying machine and air compressor machine to be filled position of coming to nothing, using using rubber stopper temporary plugging spray-hole after each area spray, after standing 5-10d after all injections, it opens rubber stopper inspection and postinjection ensures that material filling is full in each subregion that comes to nothing, finally with the Concrete Filled spray-hole for being higher than one strength grade of original ground concrete, after at least standing 28 days, construction waterproof layer, restore ground.Construction method of the present invention is simple, it is easy to operate, gather materials on the spot, pollution-free, short time limit, economical rationality is low in cost, and regulation effect is good, wide adaptability.
Description
Technical field
The present invention relates to building foundation engineering technical field, it is specifically a kind of build/structures object shallow foundation comes to nothing improvement
Method.
Background technique
Currently, shallow embedding pile foundation support table is broad-based is applied in China's engineering construction, and bearing capacity is high, construction cost bottom, builds
Build that object stability is good, but the shallow embedding pile foundation support table basis for using on soft foundation, due to the consolidation of soft layer, Yi Jisui
The increase of time, the creeping of foundation soil, the rheological equationm of state, shallow-layer inter-pile soil and then sink, generate cushion cap and foundation soil come to nothing it is existing
As.
Especially some workshops of coastal area, after the leveling of place, top is dispersed with certain thickness recent fill, lower part
It is dispersed with deep ocean sludge, the duration of workshop is generally shorter, and using shallow embedding pile foundation support table basis, pile foundation uses PHC
Prestressed concrete pipe pile is generally supported using plastic~clay of hard plastic state or the medium coarse sand containing cohesive soil of dense state as stake
Power layer will generate consolidation settlement, gesture under flat filled load effect on the scene although considering pile foundation negative friction force influence when design
The regional land subsidence must be caused, after the completion of pile foundation support table construction, due to as ocean sludge layer consolidation settlement is into one
Step development, causes coming to nothing for the constructions of structures shallow foundation such as workshop.
General building or structures can consider the influence of Measurement of Negative Friction of Piles in the design, but basis is come to nothing pair
Build/structures still generate following influence: (1) it due to basis with foundation soil is come to nothing, has lost a part of pile side resistance, result in stake
Depression of bearing force；(2) when dynamic load or horizontal loading are born in basis, it will lead to bearing capacity of pile foundation and be greatly lowered, shadow
Ring construction of structures safety.(3) basis is chronically at the state of coming to nothing with ground, influence appearance, reliability, applicability that construction builds and
Durability.
Therefore it shallow foundation is built to construction comes to nothing and handle, be problem in the urgent need to address.At present for coming to nothing
Processing method, typically by the way of bored grouting, injecting paste material generally uses cement, waterglass, concrete etc., the note
Higher cost is starched, it is easy to pollute, and be not appropriate for large area shallow foundation and come to nothing processing.
Summary of the invention
The present invention is insufficient according to prior art, provide it is a kind of it is easy for construction, construction cost is cheap, pollution-free and construction work
Phase is short, construction effect is good, and what construction quality was easy to guarantee build/and structures object shallow foundation comes to nothing administering method.
One kind of the present invention builds/structures shallow foundation empty processing method, it is characterised in that specific step is as follows:
(1) by Ground Penetrating Radar build/structures bottom detected, to build/structure base comes to nothing and identifies, really
Fixed position specific location, area and the depth to be treated of coming to nothing；
(2) subregion is carried out to the position of coming to nothing identified in step (1), subregion is carried out to area of coming to nothing and is considered as the area's area that comes to nothing
Size and spraying machine performance carry out subregion；And spray-hole is drilled in each region of coming to nothing, the aperture of spray-hole is 110mm, more
A spray-hole is in quincunx distribution, and pitch-row is 3~5m；Spray-hole is drilled with using portable pore-forming equipment, and drill bit is straight
Diameter is 110mm；
(3) prepare spraying equipment and packing material, the spraying equipment be include concrete-spraying machine and air compressor machine, air compressor machine passes through
Air-pressure tube is connect with concrete-spraying machine, and S type injector head is equipped on the injection pipe of concrete-spraying machine；The packing material is construction site
Any one or a few mixing in detail sand, medium coarse sand, Guamishi or mountain flour, and the partial size of packing material is not more than 15mm；
(4) position of coming to nothing is transported directly to after assembling spraying equipment, and the S type injector head of injection pipe is inserted into and is taken off
In the empty most marginal spray-hole in position, then blasting materials are added in concrete-spraying machine, and open concrete-spraying machine and pneumatics simultaneously
Machine；Packing material is directly sprayed into region of coming to nothing by spray-hole, when packing material is filled to the orifice position of spray-hole, just
Stop injection, take out injector head, using rubber stopper by the spray-hole temporary plugging, is then inserted into S type injector head adjacent thereto
Next spray-hole in continue to spray, sequentially into being completely filled the position of coming to nothing, stop injection；
(5) after standing 5-10d, the temporary plugging rubber stopper of each spray-hole is opened, and check one by one often by spray-hole
A subregion material filling saturation degree of coming to nothing carries out secondary injection for filling not full region, after secondary injection again
Using rubber stopper by spray-hole temporary plugging, 5-10d is stood, being again turned on inspection, it fills saturation degree, until making each area of coming to nothing
It is filled in domain full；The detection of specific saturation degree using for example long spade of auxiliary tool, downhole imaging etc. generally by being detected
It determines；
(6) wait region of coming to nothing be stuffed entirely with it is full after, the crude position chipping of hole wall will be sprayed with pneumatic pick, then with being higher than
The Concrete Filled spray-hole of one strength grade of original ground concrete, after at least standing 28 days, construction waterproof layer restores
Build/structures bottom panel.
The present invention preferably technical solution: the position of coming to nothing be placed in build/structures bottom edges when, injection fill material
Before material, first passes through sand pocket or earth bag or lay bricks mould or pre-buried baffle blocks edge.The position at general edge is
Refer to that building long axis and short-axis direction side are come to nothing area, one side direction of short axle all can be blocked manually, long axis direction with
Sequence from left to right is blocked according to injection progress segmentation is artificial, and the length of every section of closure is preferably greater than this two times of section of injection filling
Injection hole spacing, in favor of entire course of injection be vented it is clear and coherent.
The present invention preferably technical solution: before spraying packing material, the height in region of coming to nothing is measured by visiting land mine
Degree and area, and be multiplied with height with area and calculate the volume in region of coming to nothing, while determining the dosage of packing material；And it is spraying
During penetrating, the dosage of each area filling material is recorded.
The present invention preferably technical solution: in course of injection, the injection in each region is slow from deep bottom of coming to nothing
Injection is promoted, specific injecting time can test determination according to site technique with the parameters such as movement speed are lifted up；Every injection
One region, is detected by Ground Penetrating Radar or camera, for the position of defect, carries out postinjection, it is ensured that Mei Gequ
Domain injection is complete.When using camera detection, it can be put down using a feeler lever band with the camera of 360 degree rotation, see spray
The case where penetrating filling makes up the defect being invisible to the naked eye.
The present invention preferably technical solution: described " S " the type spray head is by two radians be 60-80 degree curved steel tube
The monoblock type spray head being welded, " S " type spray head are fixedly connected with injection pipe by fixing clasp, are then consolidated by nut
It is fixed.
The present invention preferably technical solution: the height of coming to nothing at the position of coming to nothing is within 1.5m.
The present invention preferably technical solution: in step 2 to the carry out subregion at position of coming to nothing after, the area in each region is
9-15m2, a spray-hole is drilled in the center in each region.
Concrete-spraying machine and air compressor machine in the present invention are all made of existing equipment, and concrete-spraying machine is a kind of tidal gunite concrete machine
Tool has unique pressing device, is suitable for railway (highway) tunnel, skyscraper and diversion culvert, is a kind of common mixed
Solidifying soil spraying equipment.The air compressor machine uses electronic mobile screw air compressor, and the model of specific concrete-spraying machine and air compressor machine can root
It is flexibly selected according to the area's size that comes to nothing, depth of coming to nothing and de- Mined-out area disposal specific requirement.
Method of the present invention is suitable for coming to nothing height as processing of coming to nothing within 1.5m, and 1.5m or more is it is contemplated that artificial straight
It taps into and sprays filling treatment into area of coming to nothing or handled using more efficient method.
The present invention is filled region of coming to nothing using blasting materials using spray concrete technology, substantially changes previous use
The conventional method that region of coming to nothing is administered in cement grout and chemical grouting, this method technology maturation, it is easy to operate, take on the spot
Material, economical rationality is low in cost, is successfully used for Guangdong and creates steel mill, is successfully used for Guangdong and creates steel mill's water process
Project, the area's packing density that comes to nothing reach 100%, meet design requirement, and regulation effect is good, wide adaptability.
Detailed description of the invention
Fig. 1 is constructing structure schematic diagram of the invention；
Fig. 2 is nozzle structure schematic diagram of the invention；
Fig. 3 is the structural schematic diagram of fixing clasp in the present invention；
Fig. 4 is the flat distribution map of entire steel mill in the present invention；
Pending area builds/structures plan view in Fig. 5 the present embodiment；
Fig. 6 to Figure 13 is the Specific construction procedure chart in embodiment.
In figure: 1-construction of structures bottom plate, 2-sand pockets or earth bag, 3-concrete-spraying machines, 4-air compressor machines, 5-packing materials,
6-air-pressure tubes, 7-injection pipes, 8-" S " type spray heads, 8-1-fixing clasp, 8-2-snap ring nut, 9-spray-holes, 10-is new
Closely banket, 11-deep & thick silts, 12-rubber stoppers, 13-hot-rolling water processing regions, 14-filter stations, 15-horizontal flow basins and pump
Room, 16-water process electric substations, 17-Whirlwind tanks, 18-central pumping stations and water tower, 19-laminar flow pumping plants, between 20-sewage treatments
And concentration basin.
Specific embodiment
Below with reference to embodiment and attached drawing, the invention will be further described.
Construction equipment used in embodiment in the present invention, as shown in Figure 1 includes concrete-spraying machine 3 and air compressor machine 4, air compressor machine
4 are connect by air-pressure tube 6 with concrete-spraying machine 3, and S type injector head 7 is equipped on the injection pipe 7 of concrete-spraying machine 3；As shown in Fig. 2, described
" S " type spray head be the monoblock type spray head being welded by the curved steel tube that two radians are 60-80 degree, " S " type spray head 8 is logical
It crosses fixing clasp 8-1 to be fixedly connected with injection pipe 7, as shown in figure 3, the fixing end of fixing clasp 8-1 is locked by snap ring nut 8-2
Tightly.
Embodiment 1: being specifically to create steel mill as Project case using Guangdong, the flat distribution map of the steel mill as shown in figure 4,
Wherein hot-rolling water processing region 13 is back filled region recently, and the area distribution has thicker mud, and thickness is distributed in the region
The ocean sludge between 3~16.5m is spent, is backfilled so far in December, 2009, which is slowly sinking always.The region
Interior building is all made of reinforced concrete structure, is all made of pile foundation, pile-type is according to geological condition, load situation and structure shape
The pretensioned prestressed concrete pipe pile of PHC600AB110/PHC500AB100/PHC400AB95 is respectively adopted in formula etc., with
The clay of plastic~hard plastic state or the medium coarse sand containing cohesive soil of dense state are bearing course at pile end, long universal 44m of stake or so, stake
When base calculates, it is contemplated that the influence of negative friction, after the completion of pile foundation support table construction, due to ocean sludge layer consolidation settlement
Further development, cause coming to nothing for construction of structures shallow foundation.
It is reconnoitred by address situation of the Ground Penetrating Radar to the region, which is that apron beach~marine plain is former
Beginning hypsography is big, and the master stratum being distributed in place has: artificial aggrade (Qml) layer, the 4th are that Holocene series rushes proluvial (Q4 al+pl)
Layer, eolian sea product (Q4 ml+dl) layer, the 4th be Holocene series sea product (Q4 m) layer, upper Pleistocene series paste light rock group (Q3 V) and the 4th system under
It updates system Zhanjiang group sea-land interbedding facies and deposits (Ql mc) layer.Wherein artificial earth fill's thickness about 5m, marine mud thickness is in 3-16.5m
Between.The construction area east side earth's surface is dispersed with a large amount of eolian sea product (Q4 ml+dl) layer detail sand.
And entire hot-rolling water processing region is detected by Ground Penetrating Radar, to build/structure base comes to nothing and knows
Not, horizontal flow basin, central pumping station and the water tower of the hot-rolling water processing region of the steel mill, filter station, water process electric substation, pre- are found
Concentration basin, the basic of concentration basin are come to nothing, and the construction of structures plan view at position of coming to nothing is as shown in figure 5, portion of entirely coming to nothing
Position is square, and depth of coming to nothing is about 0.3~1.0m, cannot be backfilled using manual type, and position of coming to nothing is close to build
The edge of object；The volume that region of entirely coming to nothing is calculated by the data that detection radar detects, estimates packing material demand,
For problem of coming to nothing existing for above-mentioned steel mill's hot rolling water treatment zone, administered using the administering method that comes to nothing in the present invention.
HPZ6 type concrete-spraying machine is selected to be backfilled in its governance process, the technical parameter of concrete-spraying machine is production capacity 7m3/ h,
Maximum delivery is apart from the vertical 20m of horizontal 30m, conveying bore φ 64mm/ (51), maximum diameter of aggrogate 15mm, wind pressure of work
0.4-0.6MPa, blast consumption 10-15m3/min, rotor block diameter 505mm, rebound average≤10%, liquid accelerator additive amount
0.7%, main motor model Y160m3-6-7.5 (KW), vibrating motor power 0.37KW, accelerator motor model Y90L-6, speed
Solidifying agent exports pressure regulation 0.65-0.7MPa, voltage class 380V.With 10m3Air compressor machine 1, air compressor machine use electronic mobile screw
Air compressor machine, power: 37~185KW, tolerance: 6.0~25.5m3/min, pressure at expulsion: 0.7~1.8MPa, the kind of drive: straight
Connection, the type of cooling: air-cooled.The eolian sea product detail sand that packing material selects steel mill East earth's surface widely distributed is as main backfill
Material.
Specific construction process is as follows:
(1) subregion is carried out to hot-rolled area to be treated, the area of each subregion is 9-15m2, since position of coming to nothing is whole
Body be it is rectangular, so each subregion be it is rectangular, and calculate the packing material dosage of each subregion, then use portable drilling
Machine is drilled with a spray-hole in the center of each subregion, and the aperture of spray-hole is 110mm, and multiple spray-holes are in quincunx point
Cloth, pitch-row is 3~5m, specifically as shown in Fig. 6 to Figure 13；
(2) along build/part of structures short-axis direction side and long axis direction side comes to nothing area's outer edge, with sand pocket or soil
Bag 2 is manually blocked, to keep out the material of injection；
(3) ready concrete-spraying machine 3 is connect by air-pressure tube 6 with air compressor machine 4, S type injector head 7 is then mounted on spray
The diameter of the injection pipe of concrete machine 3, S type injector head 7 is about 70-80mm；
Then ready spraying equipment and packing material are transported to construction site, and by the S type injector head of injection pipe
Insertion is come to nothing in the most marginal spray-hole in position, then blasting materials is added in concrete-spraying machine, and open concrete-spraying machine simultaneously
And air compressor machine；Packing material is directly sprayed into region of coming to nothing by spray-hole, when packing material is filled to the aperture of spray-hole
Position, just stop injection, take out injector head, using rubber stopper by the spray-hole temporary plugging, then by S type injector head insertion with
Continue to spray in its adjacent next spray-hole, specific injection order is as shown in Fig. 6 to Figure 13, and wherein Fig. 6 is an injection
Sequence trend graph in the process, specific injection order be in Fig. 6 and Figure 13 1. -2. -3. -4. -5. -4. sequence, Fig. 7 to Figure 12 are
The specific course of injection figure of injection order in Fig. 6, the wherein 1. number hole injection in Fig. 7 corresponding diagram 6, in Fig. 8 corresponding diagram 6 2. number
Hole is sprayed, the 3. number hole injection in Fig. 9 corresponding diagram 6,4. number hole injection in Figure 10 corresponding diagram 6,5. number hole spray in Figure 11 corresponding diagram 6
It penetrates, the 4. secondary injection in number hole in Figure 12 corresponding diagram 6, after first course of injection is completed, and according to course of injection in Figure 13
Sequence trend graph carries out the second wheel injection, until making the position of coming to nothing spray filling completion completely.It is often filled in course of injection
A region is completed, is checked with downhole imaging head apparatus, to defect place, then carries out postinjection, while recording good spray
Material utilization amount is penetrated, each injection hole injection finishes, and carries out temporary plugging with rubber stopper 12；To keeping the position of coming to nothing complete
Filling stops injection；
(4) it stands after a week, opens the temporary plugging rubber stopper of each spray-hole, and utilize auxiliary tool from spray-hole
Such as long spade, downhole imaging check subregion material filling saturation degree of each coming to nothing one by one, carry out for filling not full region
Secondary injection stands 5-10d, is again turned on inspection again using rubber stopper by spray-hole temporary plugging after secondary injection
It fills saturation degree, until making to fill in each region of coming to nothing full；
(6) wait region of coming to nothing be stuffed entirely with it is full after, the crude position chipping of hole wall will be sprayed with pneumatic pick, then with being higher than
The Concrete Filled spray-hole of one strength grade of original ground concrete, after at least standing 28 days, construction waterproof layer restores
Build/structures ground.
Handle pollution-free, short time limit to coming to nothing of occurring of steel mill's hot rolling water treatment zone using the above method, passes through
The detection in later period, the area's packing density that comes to nothing reach 100%, meet design requirement, and regulation effect is good, wide adaptability.
Claims (7)
1. one kind builds/structures shallow foundation empty processing method, it is characterised in that specific step is as follows:
(1) by Ground Penetrating Radar build/structures bottom detected, to build/structure base comes to nothing and identifies, determining needs
Position specific location, area and the depth to be processed of coming to nothing；
(2) subregion is carried out to the position of coming to nothing identified in step (1), the area in each region is 9-15m2, and in each area of coming to nothing
Spray-hole is drilled in domain, spray-hole aperture is 110mm, and multiple spray-holes are in quincunx distribution, and pitch-row is 3~5m；
(3) prepare spraying equipment and packing material, the spraying equipment include concrete-spraying machine and air compressor machine, air compressor machine passes through air-pressure tube
It is connect with concrete-spraying machine, S type injector head is installed on the injection pipe of concrete-spraying machine；The S type injector head is equal by two radians
For the monoblock type spray head that the curved steel tube of 60-80 degree is welded, the packing material be construction site detail sand, in it is thick
Any one or a few mixing in sand, Guamishi or mountain flour, and the partial size of packing material is not more than 15mm；
(4) position of coming to nothing is transported directly to after assembling spraying equipment, and the S type injector head of injection pipe is inserted into portion of coming to nothing
In the most marginal spray-hole in position, then packing material is added in concrete-spraying machine, and open concrete-spraying machine and air compressor machine simultaneously；Directly
It connects overspray hole and sprays packing material into region of coming to nothing, when packing material is filled to the orifice position of spray-hole, just stop
Injection, take out injector head, using rubber stopper by the spray-hole temporary plugging, then by S type injector head be inserted into it is adjacent thereto under
Continue to spray in one spray-hole, sequentially into the position of coming to nothing is completely filled, stops injection；
(5) after standing 5-10d, the temporary plugging rubber stopper of each spray-hole is opened, and each take off is checked by spray-hole one by one
Empty region material filling saturation degree carries out secondary injection for filling not full region, uses again after secondary injection
Spray-hole temporary plugging is stood 5-10d by rubber stopper, and being again turned on inspection, it fills saturation degree, until making each come to nothing in region
It fills full；
(6) wait region of coming to nothing be stuffed entirely with it is full after, the crude position chipping of hole wall will be sprayed with pneumatic pick, then be higher than it is original
The Concrete Filled spray-hole of one strength grade of ground concrete, after at least standing 28 days ,/structure is built in construction waterproof layer, recovery
Build object bottom panel.
2. one kind according to claim 1 builds/structures shallow foundation empty processing method, it is characterised in that: described de-
Empty position be placed in build/structures bottom edges when, before spraying packing material, first pass through sand pocket or earth bag or mould or pre- of laying bricks
Baffle is buried to block edge.
3. one kind according to claim 1 builds/structures shallow foundation empty processing method, it is characterised in that: spraying
Before packing material, the height and area in region of coming to nothing are measured by Ground Penetrating Radar, and be multiplied and calculated with area with height
Come to nothing the volume in region, determines the dosage of packing material；And in course of injection, the use of each area filling material is recorded
Amount.
4. one kind according to claim 1 builds/structures shallow foundation empty processing method, it is characterised in that: Mei Gequ
The injection in domain all slowly promotes injection from deep bottom of coming to nothing, and one region of every injection is carried out by Ground Penetrating Radar or camera
Detection carries out postinjection, it is ensured that each area spray is complete for the position of defect.
5. one kind according to claim 1 builds/structures shallow foundation empty processing method, it is characterised in that: the S type
Injector head is fixedly connected by fixing clasp with injection pipe.
6. one kind according to claim 1 builds/structures shallow foundation empty processing method, it is characterised in that: described de-
The height of coming to nothing at empty position is within 1.5m.
7. one kind according to claim 1 builds/structures shallow foundation empty processing method, it is characterised in that: in step
(2) after carrying out subregion to position of coming to nothing in, a spray-hole is drilled in the center in each region.
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| CN106759561A (en) | 2017-05-31 |
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