CN1380474A - Foundation member, foundation construction method and its application - Google Patents
Foundation member, foundation construction method and its application Download PDFInfo
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- CN1380474A CN1380474A CN 02115298 CN02115298A CN1380474A CN 1380474 A CN1380474 A CN 1380474A CN 02115298 CN02115298 CN 02115298 CN 02115298 A CN02115298 A CN 02115298A CN 1380474 A CN1380474 A CN 1380474A
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Abstract
The compression strength of bearing body being in steel hooped cylinder in tension state is raised by about four times, and three methods of explosion compaction, ramming hammer compaction and addition of cement, sand and stone in rock-soil are adopted to reinforce rock-soil, therefore the bearing force of foundation formed from steel hooped cylinder, bearing body and compaction-reinforced rock-soil also can be raised several times over, so that said invention provides two effective construction methods of utilizing explosion compaction to reinforce rock-soil and utilizing softened and sludged rock-soil to accelerate foundation settlement.
Description
The present invention relates to ground and basic field.
In existing ground and basic technology, there is following deficiency: 1, do not give full play to and utilize " the cuff restraint forces effect " of steel pipe effectively to improve the compressive strength of materials such as concrete, cement-soil.Because the compressive strength of steel pipe inner core concrete is 1.8-5.7 times of ordinary concrete compressive strength, one times of every raising core concrete compressive strength just can reduce half infrastructure investment.2, do not make full use of original rock-soil material in the ground.Because sedimentation limits requirement, argillic horizon under the basis (as pile foundation, raft foundation and case base) and soft stratum (comprising primary soft rock, weathering soft rock, the broken soft rock of tomography etc.) are cut out the fresh rock stratum of exposing no weathering, replace materials such as backfill concrete then.3, the method for formation datum hole, foundation trench, foundation ditch produces as adverse effects such as soil compaction, precipitation, differential settlement, noise, mud contaminations environment on every side.4, expense cost height.The unit bearing capacity expense height on basis, the minimum PHC pile foundation (pre-stress high-strength concrete pipe pile) of expense also 1 yuan/more than the KN.5, existing basic pattern and job practices is of a great variety, complex procedures and versatility are poor.
Purpose of the present invention is exactly in order to overcome the weak point in above-mentioned ground and the basic technology, provides that a kind of operation is simple, protection environment, bearing capacity height, versatility is good, unit bearing capacity expense is low basic component and foundation construction method purposes extremely.
Purpose of the present invention can reach by taking following measure.A kind of basic component includes stirrup tube 1 and pressure-bearing body 2, and it is characterized in that: pressure-bearing body 2 constitutes basic component in stirrup tube 1; The wall thickness of stirrup tube 1 is between the 3-200 millimeter, and the ratio of the wall thickness of the diameter of pressure-bearing body 2 or minor face length and stirrup tube 1 is between 30-200; Pressure-bearing body 2 is to contain the wherein a kind of or mixture of different materials wherein of cement, lime, sand, rubble, flyash, industrial residue, water.Because " hoop cover restraint forces effect ", the compressive strength of the pressure-bearing body 2 in stirrup tube 1 significantly improves, and the bearing capacity of basic component also significantly improves.
A kind of job practices of basis is characterized in that: adopt two kinds of method formation bases, and the one, basic component is entered underground formation base; Perhaps two is to enter stirrup tube 1 underground, the ground or the part ground of discharging in the stirrup tube 1 form datum hole, foundation trench, foundation ditch, in stirrup tube 1, pour into and contain cement, lime, sand, rubble, flyash, industrial residue, water mixture formation wherein a kind of or wherein different materials pressure-bearing body 2, constitute the basis.Because " hoop cover restraint forces effect ", the compressive strength pressure-bearing body 2 in stirrup tube 1, the residue ground significantly improves, and the bearing capacity on basis also significantly improves.
A kind of job practices of basis, it is characterized in that: contain water, water reducing agent, plasticizing agent, tackifier, blowing agent, surfactant, mud, swell soil, soil, sand, air etc. wherein a kind of or wherein different materials mix with ground, form the softening argillization geotechnical body of stream plastic state; Moisture, gas by increasing ground, mud, sand amount and to the even mixing mix of ground, accelerate softening, the argillization of stream plastic state of ground, reduce building, member, accessory, equipment, the resistance when instrument enters ground, accelerated the speed that it enters ground; Adopt stirring or injection or immersed tube or impact method that ground is carried out mixed processes; Stirring or injection or immersed tube or impact facility adopt vertical level to or the oblique ground that enters; Water reducing agent, flocculant mainly are made up of nonionic, anion, cationic surface active material, and effect is the frictional resistance that reduces between the ground particle, help between the ground particle moisture content and separate out, discharge and flow; Building, member, accessory, equipment, instrument adopt vertical or level to or the oblique softening argillization geotechnical body of stream plastic state that enters; Building, member, accessory, equipment, instrument can be divided into several fractions, and branch's piecemeal enters the softening argillization geotechnical body of stream plastic state respectively.
A kind of job practices of basis, it is characterized in that: in ground or in the medicine hole 4 that under datum hole, foundation trench, foundation ditch, forms, put into explosive, detonation of explosives then, utilize blast pressure compacted geotechnical body and form explosive expansion cavity 5, in explosive expansion cavity 5, pour into or pressure pour into contain cement, lime, sand, rubble, flyash, industrial residue, the water ash is wherein a kind of or the mixture of different materials wherein, formation base or part basis.This method is to utilize the compacted clay of pressure and the soft rock mass (comprising primary soft rock, weathering soft rock, the broken soft rock of tomography etc.) of blast, make clay and soft rock mass reach higher density, intensity and can not produce bigger compressive strain sedimentation, utilize compacted clay and soft rock mass a part as ground or basis, reduce the displacement excavated volume of original clay and soft rock mass, especially form soft or hard and interlace very effective under the geological conditions of interlayer at argillic horizon, completely decomposed layer, severely-weathered layer, middle weathered layer, little weathered layer rock mass.
The purposes of the job practices on foregoing a kind of basic component and basis is characterized in that: be applicable to pile foundation, raft foundation, box foundation, bar basis, single footing, diaphragm wall, open caisson, foundation ditch.
The present invention can also reach by following measure:
Pressure-bearing body 2 is solid or hollow; Stirrup tube 1 is single or a plurality of combining, when adopting a plurality of stirrup tubes 1 to combine, contact part 7 with steel plate, steel lacing, reinforcement fabrication is formed integral body to a plurality of stirrup tube 1 weldering knots or bolt, constitutes abnormity, large foundation, as square rectangle or L shaped or T shape pile foundation; The cross section of stirrup tube 1 is circle or sub-circular; The external surface of stirrup tube 1 has antirust coat, and antirust coat adopts zinc-plated or antirusting paint.
Adopt four kinds of methods that pressure-bearing body 2 is born all or, eliminate, reduce the vertical pressure load that stirrup tube 1 is born near whole vertical pressure loads: the one, have on stirrup tube 1 inwall to prevent the isolation lubricating layer that bonds; Perhaps two is the unloading holes 6 that are distributed with circular aperture on the stirrup tube; Perhaps three is that the upper surface of pressure-bearing body 2 exceeds stirrup tube 1 upper surface; Perhaps four is hoop tubes 8 in being provided with in stirrup tube 1, and the upper surface of interior hoop tube 8 exceeds stirrup tube 1 upper surface.The isolation lubricating layer has reduced adhesion stress, the frictional resistance between stirrup tube 1 and the pressure-bearing body 2, when making stirrup tube 1 pressurized, at first surrenders unloading hole 6, the upper surface of pressure-bearing body 2, interior hoop tube 8 exceeds stirrup tube 1 upper surface, and pressure-bearing body 2 is born all or approaching all vertical pressure loads.These four kinds of methods make stirrup tube 1 be in single tensile stress state, rather than the reversion complex stress condition, make " hoop cover restraint forces effect " increase, and the compressive strength of pressure-bearing body 2 improves more.
Adopt two kinds of methods to form datum hole, foundation trench, the foundation ditch on basis, the one, steel casing 3 is inserted earlier or screw in underground, ground in the expelling tube forms stake hole, foundation trench, foundation ditch, perhaps two are steel casings 3 from outside or overlap together nestable from the lining with stirrup tube 1, insert or screw in underground simultaneously, ground in the expelling tube forms datum hole, foundation trench, foundation ditch; Adopt three kinds of method formation bases, the one, basic component is inserted in stake hole, foundation trench, the foundation ditch, formation base, perhaps two be steel casing 3 from outside or overlap together nestable with basic component from the lining, insert simultaneously or screw in underground, transfer to steel casing 3, formation base, perhaps three is in the stirrup tube 1 in inserting a hole, foundation trench, foundation ditch, pour into and contain cement, lime, sand, rubble, flyash, industrial residue, water mixture formation wherein a kind of or wherein different materials pressure-bearing body 2, transfer to steel casing 3, formation base before or after the mixture pouring into; Basic component, stirrup tube 1, steel casing 3 insert or screw in underground before, adopt to stir or injection method water, water reducing agent, flocculant, surfactant, mud, soil, air etc. wherein a kind of or wherein different materials mix with underground ground, moisture, tolerance by increasing underground ground and to the mixing mix of underground ground, accelerate softening, the argillization of fluidised form of underground ground, reduced basic component, stirrup tube 1,3 insertions of steel casing or screwed in underground frictional resistance; The wall thickness of steel casing 3 greater than the wall thickness of the wall thickness of stirrup tube 1, steel casing 3 greater than 10 millimeters, the big steel casing 3 of rigidity from outside or from the little stirrup tube 1 of lining telescoping rigidity, adopt this method to reduce the thin stirrup tube 1 of wall thickness in the damage of inserting or screwing in when underground.
In the tube of stirrup tube 1, steel casing 3 or tube ground down can not discharge yet, adopts three kinds of method ground extruding stirrup tubes 1, steel casing 3 tin in or tin under ground; The one, adopt blast pressure ground extruding method; Perhaps two is to adopt the compacted method of hammer ram ground tamping; Perhaps three is adopt to stir or injection method, mixes wherein a kind of or different materials wherein of cement, lime, sand, rubble, flyash, industrial residue, water in ground, and mixes formation pressure-bearing body 2 with ground in the tube; Wherein the incorporation of cement is between 10%-40%.
Its basic component is used for post, bar, the limb of building; Perhaps its basic job practices is used for post, the bar of building, the job practices of limb.
Compared with prior art, the present invention has following outstanding advantage: 1, solved five weak points in the above-mentioned existing basic technology, the ground and the unit bearing capacity expense cost on basis are reduced greatly, also will reduce more than one times than PHC pile foundation at a low price.2, initiate two kinds of effective job practicess in the foundation construction, promptly utilized blasting compaction to reinforce the ground method; Utilize softening argillization ground to accelerate the foundation settlement method.3, provide a whole set of can be fit to most of geological conditions, the universal basic component and the foundation construction method of standardization, seriation, modularization.Reduced existing mixed and disorderly unordered and miscellaneous basic component and job practices,, createed bigger economic and social benefit for ground and foundation construction provide a feasible specialization, industrialization way.
Be to describe the present invention in conjunction with the accompanying drawings below.
Fig. 1 is the structure facade section of the embodiment of the invention 1.
Fig. 2 is the structure facade section of the embodiment of the invention 2.
Fig. 3 is the structure facade section of the embodiment of the invention 3.
Fig. 4, Fig. 5 are the plan views of the embodiment of the invention 4.
As can be seen from Figure 1, present embodiment 1 is a kind of prefabricated steel pipe concrete hollow pile basic component, it includes hollow pressure-bearing body 2 that stirrup tube 1, concrete that steel pipe manufactures manufacture, be provided with several unloading hole 6 in the end of stirrup tube 1, scribble the isolation lubricating layer of pitch at steel pipe internal-surface, and outer surface of steel tube has zinc-plated antirust coat.Its job practices is to adopt hammering, static pressure method to insert steel pipe concrete hollow pile basic component underground; When steel pipe hollow concrete combination pile lining is thin, adopt steel casing 3 from outside or overlap together nestablely with steel pipe hollow concrete compound pile from the lining, insert simultaneously or screw in underground; Also can before insertion, mix the ground of water and water reducing agent (surfactant), air and pile foundation position, produce the softening argillization of ground, the frictional resistance when reducing pile sinking with stirring or injection method; The employing people digs, water dashes, auger is discharged the ground in the stake core; In the stake core, inject concrete and form solid pressure-bearing body 2.This type can be used for substituting existing P HC pile tube.
As can be seen from Figure 2, present embodiment 2 is job practicess of a kind of immersed tube bored pile foundation, operation is as follows: steel casing 3 from outside or overlap together nestable from the lining with stirrup tube 1, insert simultaneously or screw in underground, stake point 9 with 1 welding (bolt knot) of stirrup tube together, stake point 9 enters middle weathered rock formation, discharges the soil in the stirrup tube 1, stays the weathered rock formation; Adopt hammer ram to the weathered rock formation compacting ground extruding in the tube, under the tube; Transfer to steel casing 3; Pour into concrete and form pressure-bearing body 2, constitute the pile foundation of stirrup tube 1, concrete, ground extruding decomposed rock.Because " hoop cover restraint forces effect " and the compacted effect of compacting, in, the intensity of little decomposed rock improves, the sedimentation and deformation minimizing, avoided under the excavation and filling pile foundation in, the displacement engineering cost of gentle breeze rock, this kind combined piles foundation replaces existing various castinplace pile.
Present embodiment 3 is immersed tube bored pile foundation construction methods of a kind of blasting compaction basement rock as can be seen from Figure 3.Behind the ground in discharging steel casing 3, stirrup tube 1, boring forms medicine hole 4 in tube base rock, at the bottom of the tube, put into explosive in the medicine hole 4, detonation of explosives then, geotechnical body that the pressure of utilization blast is compacted also forms explosive expansion cavity 5 (dotted line comprises scope among the figure), dial-out steel casing 3 pours in explosive expansion cavity 5 or pressure pours into concrete, forms pressure-bearing body 2; Perhaps also can pour into concrete earlier, form after the pressure-bearing body 2 of epimere pile body, by the reserving hole channel on epimere pile body pressure-bearing body 2, at the bottom of the tube, put into explosive in the medicine hole 4, detonation of explosives, blasting compaction is reinforced the ground under the epimere pile body pressure-bearing body 2, forms explosive expansion cavity 5, and then by reserving hole channel concrete, cement paste, cement mortar pressure is poured into formation hypomere pile body in the explosive expansion cavity 5; Hoop tube 8 in stirrup tube 1, being provided with, the upper surface of interior hoop tube 8 and the upper surface of pressure-bearing body 2 exceed the upper surface of stirrup tube 1; All the other operations are with embodiment 2, the pile foundation of geotechnical body that to constitute the epimere pile body like this and be steel pipe concrete and hypomere pile body be compacted and concrete.
By Fig. 4, Fig. 5 as can be known, present embodiment 4 is by large-scale, the special-shaped basis that a plurality of stirrup tubes 1 constitute single-row combination and multiple row combination to be arranged, adopt welding or bolt between stirrup tube 1 and the stirrup tube 1, with 7 steel plates welding of contact part or bolt, a plurality of stirrup tubes 1 are constituted whole large-scale, special-shaped basis between the outer point of contact line of limit, angle steel hoop tube 1; Stirrup tube 1 and the space cavity of getting in touch between part 7 steel plates are irritated and are filled out with concrete, cement paste, cement mortar, sand, rubble.All the other operations are with implementing 1,2,3; This basis can be used for box foundation, bar basis, single footing, diaphragm wall, open caisson, base etc.
Claims (10)
1. a basic component includes stirrup tube 1 and pressure-bearing body 2, and it is characterized in that: pressure-bearing body 2 constitutes basic component in stirrup tube 1; The wall thickness of stirrup tube 1 is between the 3-200 millimeter, and the ratio of the wall thickness of the diameter of pressure-bearing body 2 or minor face length and stirrup tube 1 is between 30-200; Pressure-bearing body 2 is to contain the wherein a kind of or mixture of different materials wherein of cement, lime, sand, rubble, flyash, industrial residue, water.
2. the job practices on foregoing a kind of basis is characterized in that: adopt two kinds of method formation bases, and the one, basic component is entered underground formation base; Perhaps two is to enter stirrup tube 1 underground, the ground or the part ground of discharging in the stirrup tube 1 form datum hole, foundation trench, foundation ditch, pour into to contain cement, lime, sand, rubble, flyash, industrial residue, water mixture formation wherein a kind of or wherein different materials pressure-bearing body 2 in stirrup tube 1.
3. the job practices on a basis, it is characterized in that: contain water, water reducing agent, plasticizing agent, tackifier, blowing agent, surfactant, mud, swell soil, soil, sand, air etc. wherein a kind of or wherein different materials mix with ground, form the softening argillization geotechnical body of stream plastic state; Adopt stirring or injection or immersed tube or impact method that ground is carried out mixed processes; Stirring or injection or immersed tube or impact facility adopt vertical level to or the oblique ground that enters; Water reducing agent, flocculant mainly are made up of nonionic, anion, cationic surface active material; Building, member, accessory, equipment, instrument adopt vertical or level to or the oblique softening argillization geotechnical body of stream plastic state that enters; Building, member, accessory, equipment, instrument can be divided into several fractions, and branch's piecemeal enters the softening argillization geotechnical body of stream plastic state respectively.
4. the job practices on a basis, it is characterized in that: in ground or in the medicine hole 4 that under datum hole, foundation trench, foundation ditch, forms, put into explosive, detonation of explosives then, utilize blast pressure compacted geotechnical body and form explosive expansion cavity 5, in explosive expansion cavity 5, pour into or pressure pour into contain cement, lime, sand, rubble, flyash, industrial residue, the water ash is wherein a kind of or the mixture of different materials wherein.
5. the purposes of the job practices on foregoing a kind of basic component and basis is characterized in that: be applicable to pile foundation, raft foundation, box foundation, bar basis, single footing, diaphragm wall, open caisson, foundation ditch.
6. according to the job practices on claim 1 and 2 described a kind of basic components and basis, it is characterized in that: pressure-bearing body 2 is solid or hollow; Stirrup tube 1 is single or a plurality of combining, and when adopting a plurality of stirrup tubes 1 to combine, with the contact part 7 of steel plate, steel lacing, reinforcement fabrication a plurality of stirrup tube 1 weldering knots or bolt is formed integral body; The cross section of stirrup tube 1 is circle or sub-circular; The external surface of stirrup tube 1 has antirust coat, and antirust coat adopts zinc-plated or antirusting paint.
7. according to claim 1 and 2 described a kind of basic components and basic job practices, it is characterized in that: adopt four kinds of methods that pressure-bearing body 2 is born all or, eliminate, reduce the vertical pressure load that stirrup tube 1 is born near whole vertical pressure loads: the one, have on stirrup tube 1 inwall to prevent the isolation lubricating layer that bonds; Perhaps two is the unloading holes 6 that are distributed with circular aperture on the stirrup tube; Perhaps three is that the upper surface of pressure-bearing body 2 exceeds stirrup tube 1 upper surface; Perhaps four is hoop tubes 8 in being provided with in stirrup tube 1, and the upper surface of interior hoop tube 8 exceeds stirrup tube 1 upper surface.
8. according to the job practices on claim 2 and 3 described a kind of bases, it is characterized in that: adopt two kinds of methods to form datum hole, foundation trench, the foundation ditch on basis, the one, steel casing 3 is inserted earlier or screw in underground, ground in the expelling tube forms stake hole, foundation trench, foundation ditch, perhaps two are steel casings 3 from outside or overlap together nestable from the lining with stirrup tube 1, insert or screw in underground simultaneously, ground in the expelling tube forms datum hole, foundation trench, foundation ditch; Adopt three kinds of method formation bases, the one, basic component is inserted in stake hole, foundation trench, the foundation ditch, formation base, perhaps two be steel casing 3 from outside or overlap together nestable with basic component from the lining, insert simultaneously or screw in underground, transfer to steel casing 3, formation base, perhaps three is in the stirrup tube 1 in inserting a hole, foundation trench, foundation ditch, pour into and contain cement, lime, sand, rubble, flyash, industrial residue, water mixture formation wherein a kind of or wherein different materials pressure-bearing body 2, transfer to steel casing 3, formation base before or after the mixture pouring into; Basic component, stirrup tube 1, steel casing 3 insert or screw in underground before, adopt stir or injection method water, water reducing agent, flocculant, surfactant, mud, soil, air etc. wherein a kind of or wherein different materials mix with underground ground; The wall thickness of steel casing 3 greater than the wall thickness of the wall thickness of stirrup tube 1, steel casing 3 greater than 10 millimeters.
9. according to the job practices on claim 2 and 3 and 4 described a kind of bases, it is characterized in that: in the tube of stirrup tube 1, steel casing 3 or tube ground down can not discharge yet, adopt 3 in three kinds of method ground extruding stirrup tubes 1, steel casing in or tin under ground; The one, adopt blast pressure ground extruding method; Perhaps two is to adopt the compacted method of hammer ram ground tamping; Perhaps three is adopt to stir or injection method, mixes wherein a kind of or different materials wherein of cement, lime, sand, rubble, flyash, industrial residue, water in ground, and mixes formation pressure-bearing body 2 with ground in the tube; Wherein the incorporation of cement is between 10%-40%.
10. the purposes of the job practices on a kind of basic component according to claim 1 and claim 6 and 7 described a kind of bases is characterized in that: its basic component is used for post, bar, the limb of building; Perhaps its basic job practices is used for post, the bar of building, the job practices of limb.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02115298 CN1380474A (en) | 2002-05-30 | 2002-05-30 | Foundation member, foundation construction method and its application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02115298 CN1380474A (en) | 2002-05-30 | 2002-05-30 | Foundation member, foundation construction method and its application |
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| CN1380474A true CN1380474A (en) | 2002-11-20 |
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| CN 02115298 Pending CN1380474A (en) | 2002-05-30 | 2002-05-30 | Foundation member, foundation construction method and its application |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182178A (en) * | 2010-12-17 | 2011-09-14 | 陈东曙 | Solid and hollow integrated pile, pile forming device and pile forming method |
| CN103233479A (en) * | 2013-05-10 | 2013-08-07 | 中建七局(上海)有限公司 | Method for pouring concrete cup foundation |
| CN105256821A (en) * | 2015-11-24 | 2016-01-20 | 盐城工学院 | Prefabricated foundation device of T-shaped single-upright advertising board steel pipe column base |
| CN106400827A (en) * | 2016-08-31 | 2017-02-15 | 童帆 | Construction method of self-water-draining assembly type movable room foundation structure |
| WO2017133257A1 (en) * | 2016-02-04 | 2017-08-10 | 中清大科技股份有限公司 | Prefabricated house |
| CN108104106A (en) * | 2016-11-24 | 2018-06-01 | 神翼航空器科技（天津）有限公司 | Existing building essential bearing stratum reinforcement |
| CN112707692A (en) * | 2021-01-06 | 2021-04-27 | 上海智平基础工程有限公司 | Cutting fluid for TRD construction, preparation method and construction method |
-
2002
- 2002-05-30 CN CN 02115298 patent/CN1380474A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182178A (en) * | 2010-12-17 | 2011-09-14 | 陈东曙 | Solid and hollow integrated pile, pile forming device and pile forming method |
| CN103233479A (en) * | 2013-05-10 | 2013-08-07 | 中建七局(上海)有限公司 | Method for pouring concrete cup foundation |
| CN105256821A (en) * | 2015-11-24 | 2016-01-20 | 盐城工学院 | Prefabricated foundation device of T-shaped single-upright advertising board steel pipe column base |
| WO2017133257A1 (en) * | 2016-02-04 | 2017-08-10 | 中清大科技股份有限公司 | Prefabricated house |
| CN106400827A (en) * | 2016-08-31 | 2017-02-15 | 童帆 | Construction method of self-water-draining assembly type movable room foundation structure |
| CN108104106A (en) * | 2016-11-24 | 2018-06-01 | 神翼航空器科技（天津）有限公司 | Existing building essential bearing stratum reinforcement |
| CN112707692A (en) * | 2021-01-06 | 2021-04-27 | 上海智平基础工程有限公司 | Cutting fluid for TRD construction, preparation method and construction method |
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