CN104141297A - Weak bearing stratum foundation strengthening method and structure - Google Patents
Weak bearing stratum foundation strengthening method and structure Download PDFInfo
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- CN104141297A CN104141297A CN201410101968.3A CN201410101968A CN104141297A CN 104141297 A CN104141297 A CN 104141297A CN 201410101968 A CN201410101968 A CN 201410101968A CN 104141297 A CN104141297 A CN 104141297A
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Abstract
The invention discloses a weak bearing stratum foundation strengthening method. A bottom plate is constructed and a pile hole position and the pile hole diameter are reserved on the bottom plate according to a design drawing, pile pressing construction is performed on a concrete pile section through a reaction frame, pile sealing is realized after the design requirement is met, the bottom of the reaction frame is connected with fixed anchor rods, the top is supported by an upper-layer floor beam, during pile pressing, an upper-layer floor beam body and the bottom plate provide pile pressing reaction forces to realize pile pressing for the pile section (the conversion of forces is realized through an oil cylinder or a jack), and concrete in a pile hole and the bottom plate can be integrated through a packaging process (anchor rods are connected in a cross manner, closed encirclement of the pile hole is realized, the anchor rods are arranged in the bottom plate, and a connecting reinforcing steel bar is arranged in the concrete in the pile hole, so that the pile hole and the bottom plate can be integrated). With the adoption of the technical scheme, problems can be solved very perfectly, the method is economical, construction of underground structures and follow-up ground main structures is not delayed, the whole construction period is shortened, and the excellent application effect is achieved.
Description
Technical field
The present invention relates to a kind of weak bearing stratum foundation reinforcement method and structure, belong to technical field of building construction.
Background technology
In foundation basic construction process, in the time running into weak bearing stratum geologic structure, traditional ground stabilization reinforcement measure adopts rotary drilling rig or punching rig pore-forming often again, make reinforcing cage, concreting adds stake and carries out reinforcement and strengthening, big machinery need to be marched into the arena again, need again lay big machinery transport routes, again make the loaded down with trivial details preparations such as mud pit, after construction, still need to carry out mud outward transport, remaining mud outward transport, the machinery follow-up work such as withdraw from the arena, both uneconomical and delay underground structure and subsequently go up main structure construction, incur loss through delay the entirety duration, in order to solve as above problem, be badly in need of research and adopt novel ground stabilization measure.
Summary of the invention
The object of the invention is: a kind of weak bearing stratum foundation reinforcement method and structure are provided, this construction method principle is simple, easy construction, both economical and do not delay underground structure and subsequently go up main structure construction, save the entirety duration, obtain splendid effect, to solve current existing technical problem.
Technical scheme of the present invention
A kind of weak bearing stratum foundation reinforcement method, according to design drawing construction base plate and on base plate stake hole site and the stake bore dia of reserved layout design, realizes the pressing pile construction to mixed earth pile cutoff by reaction frame, after designing requirement, realize envelope when reaching.
In aforesaid weak bearing stratum foundation reinforcement method, on the base plate around stake hole, be embedded with bolthole simultaneously, bolthole runs through base plate, anchor pole penetrates in bolthole and fixes, reaction frame bottom is fixedly connected with anchor pole, the beam of upper strata floor is as reaction frame top support top, hydraulic jack or jack are arranged on reaction frame middle beam position and are corresponding with mixed earth pile cutoff, reaction frame is connected and fixed anchor pole by bottom, top by upper strata floor beam as support top, in piling process, provide pressure pile reaction to realize pile cutoff piling (conversion of power realizes by oil cylinder or jack) by upper strata floor beam body and base plate.
In aforesaid weak bearing stratum foundation reinforcement method, when the mixed earth pile cutoff curtailment of piling, adopt casing joint pile extension method, realizing many pile cutofves connects, in the time that the piling data of pressure meter demonstration do not meet drawing requirement, need carry out pile extension out, adopt casing joint pile extension, must make the contact completely in casing joint of two sections steel pipe, between joint and steel pipe, must weld full.When pile extension, must layering equably the weld seam of cuff butt welding be filled up, for accelerating speed of application, reduce the pile extension time.
In aforesaid weak bearing stratum foundation reinforcement method, when envelope stake, first adopt reinforcing bar that anchor pole interconnection is integrated, and then allow and build mixed earth in a hole and realize an envelope stake operation, this operation can realize in a hole mixed earth and base plate is integrated (anchor pole interconnection, realize the closed of stake hole surrounded, anchor pole is in base plate again, and connecting reinforcement, in the mixed earth in stake hole, can be realized a hole and base plate and be integrated).
A kind of weak bearing stratum foundation reinforcing structure, comprises mixed earth pile cutoff, and mixed earth pile cutoff is arranged on a hole bottom center, on the base plate around stake hole, be provided with bolthole, anchor pole inserts in bolthole, between anchor pole, realizes interconnection by connecting reinforcement, and the mixed earth of envelope stake covers stake hole and anchor pole.
In aforesaid weak bearing stratum foundation reinforcing structure, described pile cutoff is at least one.
Owing to having adopted technique scheme, compared with prior art, traditional ground stabilization reinforcement measure adopts rotary drilling rig or punching rig pore-forming often again, duration demand is long and expense is higher, destruction to building-site is serious, and technical scheme of the present invention can very ideally overcome the above problems, both economical and do not delay underground structure and subsequently go up main structure construction, save the entirety duration, obtain splendid effect.
Brief description of the drawings
Accompanying drawing 1 is invention construction schematic diagram;
Accompanying drawing 2 is invention construction process figure;
Accompanying drawing 3 is ruggedized construction front view in invention;
Accompanying drawing 4 is ruggedized construction top view in invention
Being labeled as in accompanying drawing: 1-mixes earth pile cutoff, 2-stake hole, 3-bolthole, 4-anchor pole, 5-connecting reinforcement, the mixed earth of 6-envelope stake, 7-reaction frame, 8-hydraulic jack or jack, 9-base plate, 10-floor, 11-floor beam body.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described in detail, but not as any limitation of the invention.
The weak bearing stratum foundation reinforcement method of one of the present invention, as shown in attached Fig. 1 and 2: according to design drawing construction base plate and on base plate stake hole site and the stake bore dia of reserved layout design, realize the pressing pile construction to mixed earth pile cutoff by reaction frame, realize and seal stake when reaching after designing requirement; Specific construction operation is as follows:
Step 1, preparation of construction; Construction of bottom plates, determines advance reservation stake hole site and stake bore dia on base plate according to design drawing, and on the base plate around stake hole, is embedded with bolthole simultaneously, bolthole runs through base plate, anchor pole penetrates in bolthole and is fixing, and bolthole fills up sand in the time of construction, removes before to be onstructed again;
Step 2, installation reaction frame; First anchor pole penetrated in bolthole and fix, reaction frame will keep vertically, and support top must be carried out with floor beam body in top simultaneously, and anchor pole and reaction frame use bolt or direct welding to carry out anchoring, guarantee firm stable;
Step 3, lifting pile cutoff stake in place hole; Pile tube transport will be carried out pile tube binding work according to vehicle, and pile tube is stacked and do not allowed to exceed two layers, and carries out putting of bottom pile tube and prop up and advance expenditure work, affects pile tube quality or security incident occurs in case pile tube tumbles;
Step 4, piling; After the in place and inspection of pile cutoff is correct, just can carry out piling, pile cutoff is in place must keep vertical, and jack and pile cutoff axis are remained on same vertical line, must not deflection.In the time of piling, gunnysack and the thick steel plate of 2cm that 2～3cm is thick should be padded in stake top, construction period, pile driving pressure must not exceed the deadweight that this basis and superstructure can bear, to prevent that basic superstructure from damaging, pressing pile construction must not stop over, answer one-time-reach-place, if must stop over time, pile top should rest in Soft Soil Layer, and should not exceed 24 hours idle hours, the control criterion of pressing pile construction should be to design final stake power as main, the about 10m(of stake embedded depth is through layer of sand) controlled, control criterion final pressure is bearing capacity of single pile, voltage stabilizing 30 minutes, settling amount is less than 2mm stake eventually,
Step 5, record stake embedded depth pressure gauge reading; Read the pressure gauge reading on instrument, whether control design drawing requirement meets, and processes just can seal stake as met the demands, and does not meet and just carries out the piling again of next step pile extension;
Step 6, adopt casing joint pile extension, must make the contact completely in casing joint of two sections steel pipe, between joint and steel pipe, must weld full, when pile extension, must layering equably the weld seam of cuff butt welding be filled up, for accelerating speed of application, reduce the pile extension time, can establish 2 welders welding simultaneously, after having welded, should rest 4-5 minute, after cooling Deng weldering place, can carry out piling, above three-procedure so repeatedly, until a stake embedded depth pressure gauge reading meets and just can carry out last procedure after Design Requirement Drawing and receive stake (this operation in the time that pile cutoff does not reach designing requirement just needs),
Step 7, must conscientiously carry out, foreign material in stake hole are cleaned out, drain the water away, clean hole wall to increase adhesion stress, interface processing when as large in underground water water burst (must be stopped) is carried out at new and old interface, then adopts reinforcing bar that anchor pole interconnection is integrated, and then pours into a mould the mixed earth of C30 concrete encapsulation together with former base plate, the mixed earth of this encapsulation is filled full stake hole and anchor pole, and gives tamping.
A kind of structure forming according to above-mentioned weak bearing stratum foundation reinforcement method, as shown in accompanying drawing 3 and 4: comprise mixed earth pile cutoff 1, this pile cutoff 1 is at least one, mixed earth pile cutoff 1 is arranged on a hole 2 bottom center, on the base plate around stake hole 2, be provided with bolthole 3, anchor pole 4 inserts in bolthole 3, and 4 of anchor poles are realized interconnection by connecting reinforcement 5, and the mixed earth 6 of envelope stake covers stake hole 2 and anchor pole 4.
Claims (6)
1. bearing stratum foundation reinforcement method a little less than a kind, it is characterized in that: according to design drawing construction base plate and on base plate stake hole site and the stake bore dia of reserved layout design, realize the pressing pile construction to mixed earth pile cutoff by reaction frame, realize and seal stake when reaching after designing requirement.
2. weak bearing stratum foundation reinforcement method according to claim 1, it is characterized in that: on the base plate around stake hole, be embedded with bolthole simultaneously, bolthole runs through base plate, anchor pole penetrates in bolthole and fixes, reaction frame bottom is fixedly connected with anchor pole, the beam of upper strata floor is as reaction frame top support top, and hydraulic jack or jack are arranged on reaction frame middle beam position and are corresponding with mixed earth pile cutoff.
3. weak bearing stratum foundation reinforcement method according to claim 1, is characterized in that: when the mixed earth pile cutoff curtailment of piling, adopt casing joint pile extension method, realize many pile cutofves and connect.
4. weak bearing stratum foundation reinforcement method according to claim 1, is characterized in that: when envelope stake, first adopt reinforcing bar that anchor pole interconnection is integrated, and then allow and build mixed earth in a hole and realize an envelope stake operation.
5. bearing stratum foundation reinforcing structure a little less than a kind, comprise mixed earth pile cutoff (1), it is characterized in that: mixed earth pile cutoff (1) is arranged on a hole (2) bottom center, on the base plate around stake hole (2), be provided with bolthole (3), anchor pole (4) inserts in bolthole (3), between anchor pole (4), realize interconnection by connecting reinforcement (5), the envelope mixed earth of stake (6) covers stake hole (2) and anchor pole (4).
6. weak bearing stratum foundation reinforcing structure according to claim 5, is characterized in that: described pile cutoff (1) is at least one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410101968.3A CN104141297A (en) | 2014-03-19 | 2014-03-19 | Weak bearing stratum foundation strengthening method and structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410101968.3A CN104141297A (en) | 2014-03-19 | 2014-03-19 | Weak bearing stratum foundation strengthening method and structure |
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| CN104141297A true CN104141297A (en) | 2014-11-12 |
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| CN201410101968.3A Pending CN104141297A (en) | 2014-03-19 | 2014-03-19 | Weak bearing stratum foundation strengthening method and structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104695721A (en) * | 2015-03-13 | 2015-06-10 | 济南轨道交通集团有限公司 | Building structure reinforcement method through self-generating reaction force |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4507069A (en) * | 1983-10-20 | 1985-03-26 | Foundation Control Systems, Inc. | Apparatus for positioning and stabilizing a concrete slab |
| CN101200901A (en) * | 2007-12-27 | 2008-06-18 | 山东建筑大学 | Static pressure pile process for construction of existing building basement |
| CN101858082A (en) * | 2010-06-12 | 2010-10-13 | 上海智平基础工程有限公司 | Soft soil foundation new construction post pile pressing technology and construction method thereof |
| CN202954378U (en) * | 2012-12-03 | 2013-05-29 | 刘民 | Reaction frame |
| CN203755292U (en) * | 2014-03-19 | 2014-08-06 | 中国建筑第四工程局有限公司 | Weak bearing stratum foundation reinforcing structure |
-
2014
- 2014-03-19 CN CN201410101968.3A patent/CN104141297A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4507069A (en) * | 1983-10-20 | 1985-03-26 | Foundation Control Systems, Inc. | Apparatus for positioning and stabilizing a concrete slab |
| CN101200901A (en) * | 2007-12-27 | 2008-06-18 | 山东建筑大学 | Static pressure pile process for construction of existing building basement |
| CN101858082A (en) * | 2010-06-12 | 2010-10-13 | 上海智平基础工程有限公司 | Soft soil foundation new construction post pile pressing technology and construction method thereof |
| CN202954378U (en) * | 2012-12-03 | 2013-05-29 | 刘民 | Reaction frame |
| CN203755292U (en) * | 2014-03-19 | 2014-08-06 | 中国建筑第四工程局有限公司 | Weak bearing stratum foundation reinforcing structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104695721A (en) * | 2015-03-13 | 2015-06-10 | 济南轨道交通集团有限公司 | Building structure reinforcement method through self-generating reaction force |
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Application publication date: 20141112 |
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| RJ01 | Rejection of invention patent application after publication |