CN103669422B - Waterproof construction method of pile head of anchor rod static pressure pile - Google Patents
Waterproof construction method of pile head of anchor rod static pressure pile Download PDFInfo
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- CN103669422B CN103669422B CN201310662689.XA CN201310662689A CN103669422B CN 103669422 B CN103669422 B CN 103669422B CN 201310662689 A CN201310662689 A CN 201310662689A CN 103669422 B CN103669422 B CN 103669422B
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Abstract
The invention discloses a waterproof construction method of a pile head of an anchor rod static pressure pile. The method comprises the following steps that a base plate cushion layer is constructed; steel plate waterproof casing pipes are embedded; a waterproof system is constructed; base plate reinforcing steel bars are bundled, concrete is poured, so that a structural base plate is formed, and a pile pressing hole is reserved; after the concrete strength of the structural base plate meets the requirement, the static pressure pile is pressed to be constructed to a projected depth; pile splicing construction of the static pressure pile is carried out; pile breaking and sealing construction of the static pressure pile is conducted; after the pile end of the static pressure pile is completely closed, a base plate top face waterproof layer is constructed. By means of the waterproof construction method of the pile head of the anchor rod static pressure pile, the technical problem of waterproof construction at the joint of the subsurface structure self-waterproofing base plate and the pile head of the anchor rod static pressure pile is solved, due to design of the steel plate waterproof casing pipes, additional arrangement of a waterproof paint layer, optimization of the mode of the pile pressing hole and the like, a foundation is reinforced, watertightness is also strongly guaranteed, operation is simple in the constructing process, construction is convenient and fast, constructing efficiency can be improved, meanwhile, structural attractiveness is guaranteed, and the popularization and application prospect is wide.
Description
Technical field
The invention belongs to underground space engineering waterproof slab field, specifically, relate to a kind of waterproof construction method of pile head of anchor rod static pressure pile.
Background technology
Because most municipal engineering are the comprehensive pivot buildings integrating track traffic, Public Transport Junction, Public parking area and elevated road, service load complexity can cause uneven settlement of foundation, and underground space engineering construction area is larger, local can run into the geological conditions of extreme difference, therefore, after the sole plate of its supporting underground construction has been constructed, the position for geological condition extreme difference is needed to carry out local foundation reinforcement.Because local ground reinforcing construction just carries out after sole plate completes, so large-scale machinery does not possess working space, the form of anchor jacked pile can only be adopted to carry out local ground reinforcing construction.Anchor jacked pile machinery is simple, easy to operate, have noise little, shockproof, without spoir and mud contamination, the feature such as mobile flexible, can construct under place and space-constrained condition, but also can operation while not interrupting engineering progress.
In addition, because underground space engineering has the important power equipment room such as high-voltage transforming room, switchgear house, power and lighting control room, so underground space engineering waterproofing grade is strict, structure does not allow infiltration.Underground space engineering waterproof slab comprises: the waterproof roll layer above the bed course of base plate bottom surface, base plate self-waterproof concrete layer, plate top surface waterproofing course three road waterproof.But after local foundation reinforcement anchor rod static pressure pile driving construction completes; waterproof roll layer below, the two-layer waterproof of base plate self-waterproof concrete layer lost efficacy; only surplus uppermost plate top surface waterproofing course plays function, so usually there will be infiltration phenomenon in pile crown position.Tracing it to its cause is the waterproof that have ignored pile head of anchor rod static pressure pile Nodes in the middle of construction, although architecture basics obtains reinforcement, waterproof but goes wrong, so that causes harmful effect to the using function of structure.Therefore need the construction method studying a kind of pile head of anchor rod static pressure pile waterproof, with guarantee piling complete after the waterproof construction effect of pile head of anchor rod static pressure pile reach drawing and code requirement.
Summary of the invention
The present invention is to solve the technical problem of underground structure self waterproofing base plate and pile head of anchor rod static pressure pile joint waterproof construction quality, a kind of waterproof construction method of pile head of anchor rod static pressure pile is provided, avoid static pressed pile piling operation imperfection and the piling that causes complete after pile crown infiltration.
In order to solve the problems of the technologies described above, the present invention is achieved by following technical scheme:
A kind of waterproof construction method of pile head of anchor rod static pressure pile, this construction method is carried out in accordance with the following steps:
(1) bottom cushion construction, determines piling point position, the bed course section in reserved piling hole;
(2) pre-embedded steel slab water string, described steel plate water string is the sleeve structure that surrounds of horizontal steel plate that four blocks of vertical steel plates being positioned at inner side and four pieces are positioned at outside, four pieces time pre-buried in described steel plate water string vertical steel plate the latter halfs are inserted in the bed course section in piling hole, and four pieces of horizontal steel plate simultaneously in steel plate water string ride on the bottom cushion of bed course section surrounding in piling hole;
(3) water-proof system is performed:
A. at four pieces of horizontal steel plate surfaces and the part brushing self-closing polymer waterproof coating material layer of four pieces of vertical steel plate external surfaces more than horizontal steel plate of described steel plate water string;
B. on described self-closing polymer waterproof coating material layer, waterproof roll enhancement Layer and waterproof roll layer is performed, described waterproof roll enhancement Layer and described waterproof roll layer are laid on four pieces of horizontal steel plate surfaces and four pieces of vertical steel plate external surface positions more than horizontal steel plate of described steel plate water string, and this position is the height and position that waterproof slab topping top mark height returns the width place of slow swollen type water-swellable sealing adhesive tape downwards;
C. arrange a circle in four pieces of vertical steel plate peripheries of described steel plate water string and delay swollen type water-swellable sealing adhesive tape, described slow swollen type water-swellable sealing adhesive tape is by waterproof roll enhancement Layer and waterproof roll layer end-blocking;
D. the described waterproof roll layer surface concreting on described bottom cushion is until delay swollen type water-swellable sealing adhesive tape upper surface flush with described, and as waterproof slab topping, described steel plate water string is fixed simultaneously;
(4) base plate steel bar binding concreting form structure base slab, reserve the floor section in described piling hole, and it is young trapezoidal that the floor section vertical cross-section in described piling hole is that end opening is gone up greatly;
(5) after the concrete strength of structure base slab 4 reaches requirement, by static pressed pile 7 pressing pile construction to projected depth;
(6) static pressed pile 7 pile connection construction;
(7) static pressed pile 7 broken pile, envelope pile driving construction;
(8) static pressed pile 7 end performs plate top surface waterproofing course 5 after all closing.
The invention has the beneficial effects as follows:
The present invention is by the research to local foundation reinforcement anchor jacked pile work progress, solve the technical problem of underground structure self waterproofing base plate and pile head of anchor rod static pressure pile joint waterproof construction, by designing steel plate water string and setting up waterproof coating layer, and optimize piling well format etc., define the technical scheme of complete set, provide waterproof construction method of pile head of anchor rod static pressure pile, the construction method of reinforcement based on perfect anchor jacked pile, not only machinery is simple to make anchor jacked pile technology, easy to operate, noise is little, shockproof, without spoir and mud contamination, move and be subject to place and space constraint flexibly and not, and ground stabilization quality is guaranteed, waterproof effect can meet design requirement and using function requirement, compared with other foundation reinforcing construction method employings, there is incomparable advantage.This technical operation is simple, and construct convenient, can improve efficiency of construction, not only basis obtains reinforcement, and waterproof also obtains strong guarantee, and ensure that structure is attractive in appearance, popularizing application prospect is extensive simultaneously.
Accompanying drawing explanation
Fig. 1 is the construction schematic diagram of waterproof construction method of pile head of anchor rod static pressure pile provided by the present invention;
Fig. 2 is the partial enlarged drawing of part A in Fig. 1;
Fig. 3 is the structural representation of steel plate water string provided by the present invention;
Fig. 4 is the 1-1 sectional view of Fig. 3.
In figure: 1, bottom cushion; 2, piling hole; 3, steel plate water string; 4, structure base slab; 5, plate top surface waterproofing course; 6, micro expansive concrete; 7, static pressed pile; 8, stone bolt; 9, waterproof slab topping; 10, self-closing polymer waterproof coating material layer; 11, waterproof roll enhancement Layer; 12, waterproof roll layer; 13, slow swollen type water-swellable sealing adhesive tape.
Detailed description of the invention
The present invention is described in further detail below, and following examples can make those skilled in the art more fully understand the present invention, but do not limit the present invention in any way.
As depicted in figs. 1 and 2, present embodiment discloses a kind of waterproof construction method of pile head of anchor rod static pressure pile, specifically carry out in accordance with the following steps:
(1) bottom cushion 1 is constructed, and determines piling point position.
First build bottom cushion 1, in conjunction with meter ruler determination piling central point, piling central point with piling hole 2 center superposition needing to reserve, finally must carry out piling centre mark with reinforcing bar mark.
When building bottom cushion 1, template is installed according to the size of piling hole 2 reserved location and piling hole 2 end mouth, to build the bed course section reserving piling hole 2 after bottom cushion 1 completes at bottom cushion 1, after concrete strength reaches requirement, namely stripping is forming the bed course section in piling hole 2.
(2) pre-embedded steel slab water string 3.
As shown in Figure 3 and Figure 4, steel plate water string 3 comprises the sleeve structure that four blocks of vertical steel plates and four pieces of horizontal steel plate surround, and wherein four blocks of vertical steel plates are positioned at inner side, four pieces of horizontal steel plate are positioned at outside, and head and the tail weld formation in turn respectively.
Four pieces in steel plate water string 3 vertical steel plate external dimensions are consistent with the bed course section opening size in piling hole 2, insert in the bed course section in piling hole 2 to enable in steel plate water string 3 four pieces of vertical steel plate the latter halfs, in steel plate water string 3, four pieces of horizontal steel plate ride on the bottom cushion 1 of bed course section surrounding in piling hole 2 simultaneously, and bottom cushion 1 is namely as the support of steel plate water string 3.
Steel plate water string 3 machines outside field, to guarantee size and the welding quality of steel plate water string 3.Draw when burying underground and establish cross hairs, ensure position level and with piling hole 2 centering.Steel plate water string 3 is the first line of defences of static pressed pile pile crown waterproof, is also most important defence line, and technician need control said process all-the-way tracking.
(3) water-proof system is performed.
First, at steel plate water string 3 outside coating self-closing polymer waterproof coating material layer 10, concrete brushing is in four pieces of horizontal steel plate surfaces and the part of four pieces of vertical steel plate external surfaces more than horizontal steel plate, and self-closing polymer waterproof coating material layer 10 extends to bottom cushion 1 surface of four pieces of horizontal steel plate peripheries.
Secondly; self-closing polymer waterproof coating material layer 10 performs waterproof roll enhancement Layer 11 and waterproof roll layer 12; waterproof roll enhancement Layer 11 and waterproof roll layer 12 are laid on four pieces of horizontal steel plate surface and four pieces of vertical steel plate external surfaces and return 3cm position, to ensure subsequent construction waterproof effect to waterproof slab topping 9 top mark relative superiority or inferiority more than horizontal steel plate.Waterproof roll enhancement Layer 11 extends to outside the self-closing polymer waterproof coating material layer 10 on bottom cushion 1 surface, and waterproof roll layer 12 extends to outside the waterproof roll enhancement Layer 11 on bottom cushion 1 surface, to form the state of outer lamination internal layer.
Then, arrange a circle in four pieces of vertical steel plate peripheries of steel plate water string 3 and delay swollen type water-swellable sealing adhesive tape 13, this slow swollen type water-swellable sealing adhesive tape 13 is for carrying out end-blocking to waterproof roll enhancement Layer 11 and waterproof roll layer 12.
Finally, concreting on the waterproof roll layer 12 on bottom cushion 1 top until with slow swollen type water-swellable sealing adhesive tape 13 upper surface flush, as waterproof slab topping 9, steel plate water string 3 is also fixed immediately.
(4) base plate steel bar binding and concreting, the floor section in piling hole 2 is reserved when base plate steel bar binding, it is young trapezoidal that the floor section vertical cross-section in piling hole 2 is that end opening is gone up greatly, thus ensure the sealing of hole concrete compaction of second pouring, avoid because base plate counter-force causes the phenomenon of concrete cracking.
The stone bolt 8 that pre-buried fixing pile press is used after reinforcing bar binding completes, stone bolt 8 adopts annular anchor slab pre-buried, is filled in by stone bolt 8 and is welded on annular anchor slab, and stone bolt 8 top adopts reinforcing bar cross weld to position; Then concreting is as structure base slab 4, reserves the floor section in piling hole 2.
(5) after the concrete strength of structure base slab 4 reaches requirement, carry out pressing pile construction, static pressed pile 7 adopts the mode of static pressure, based on Stress Control, controls to be auxiliary with stake compression distance.
Piling speed is strictly controlled during piling.Early stage, pile driving pressure was not excessive, Slow loading, and before avoiding, pile driving pressure is excessive in earlier stage, causes unstability.Piling process should continue, and must not pause in midway, if must pause in midway, pile top should rest on soft stratum, and the dead time must not more than 24 hours.When static pressed pile 7 reaches projected depth.Pressing pile construction is terminated after holding lotus 5min.Piling record is carried out in piling process.
(6) static pressed pile 7 pile connection construction, the place's employing of stake end is welded to connect, and carefully should check pile crown cleaning situation, and whether on the same axis to check two sections of stakes before welding, whether vertically, just can welding after meeting the demands.By two welders welding simultaneously in the both sides of stake during welding, make both sides uniform force, reduce distortion; After welding terminates, should welding quality be checked, to solder skip or weld bead height inadequate, repair welding should be carried out in time.
(7) static pressed pile 7 broken pile, envelope pile driving construction, after piling terminates, static pressed pile 7 pile crown arrives design elevation, carries out envelope stake process, does not reach design elevation, but reaches and design pile driving pressure, carries out envelope stake again after carrying out broken pile treatment.End-blocking concrete adopts micro expansive concrete 6 to pour into, and ensures to vibrate quality during perfusion, ensures concrete self-waterproof system.
(8) plate top surface waterproofing course 5 is constructed.Last plate top surface waterproofing course 5 is performed, last backfilling of earthwork after static pressed pile 7 end is all closed.
Although be described the preferred embodiments of the present invention by reference to the accompanying drawings above; but the present invention is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, can also make the concrete conversion of a lot of form, these all belong within protection scope of the present invention.
Claims (1)
1. a waterproof construction method of pile head of anchor rod static pressure pile, is characterized in that, this construction method is carried out in accordance with the following steps:
(1) bottom cushion construction, determines piling point position, the bed course section in reserved piling hole;
(2) pre-embedded steel slab water string, described steel plate water string is the sleeve structure that surrounds of horizontal steel plate that four blocks of vertical steel plates being positioned at inner side and four pieces are positioned at outside, four pieces time pre-buried in described steel plate water string vertical steel plate the latter halfs are inserted in the bed course section in piling hole, and four pieces of horizontal steel plate simultaneously in steel plate water string ride on the bottom cushion of bed course section surrounding in piling hole;
(3) water-proof system is performed:
A. at four pieces of horizontal steel plate surfaces and the part brushing self-closing polymer waterproof coating material layer of four pieces of vertical steel plate external surfaces more than horizontal steel plate of described steel plate water string;
B. on described self-closing polymer waterproof coating material layer, waterproof roll enhancement Layer and waterproof roll layer is performed, described waterproof roll enhancement Layer and described waterproof roll layer are laid on four pieces of horizontal steel plate surfaces and four pieces of vertical steel plate external surface positions more than horizontal steel plate of described steel plate water string, and this position is the height and position that waterproof slab topping top mark height returns the width place of slow swollen type water-swellable sealing adhesive tape downwards;
C. arrange a circle in four pieces of vertical steel plate peripheries of described steel plate water string and delay swollen type water-swellable sealing adhesive tape, described slow swollen type water-swellable sealing adhesive tape is by waterproof roll enhancement Layer and waterproof roll layer end-blocking;
D. the described waterproof roll layer surface concreting on described bottom cushion is until delay swollen type water-swellable sealing adhesive tape upper surface flush with described, and as waterproof slab topping, described steel plate water string is fixed simultaneously;
(4) base plate steel bar binding concreting form structure base slab, reserve the floor section in described piling hole, and it is young trapezoidal that the floor section vertical cross-section in described piling hole is that end opening is gone up greatly;
(5) after the concrete strength of structure base slab reaches requirement, by static pressed pile pressing pile construction to projected depth;
(6) static pressed pile pile connection construction;
(7) static pressed pile broken pile, envelope pile driving construction;
(8) static pressed pile stake end performs plate top surface waterproofing course after all closing.
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| CN201310662689.XA CN103669422B (en) | 2013-12-06 | 2013-12-06 | Waterproof construction method of pile head of anchor rod static pressure pile |
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| CN201310662689.XA CN103669422B (en) | 2013-12-06 | 2013-12-06 | Waterproof construction method of pile head of anchor rod static pressure pile |
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| CN103669422B true CN103669422B (en) | 2015-07-22 |
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| CN106284310B (en) * | 2015-05-21 | 2018-06-15 | 中天建设集团有限公司 | Stake holes, which is drawn water, in the case of a kind of big flow water drains envelope pile construction method |
| CN107386336A (en) * | 2017-06-27 | 2017-11-24 | 中国二十冶集团有限公司 | Pile crown node waterproof processing unit and its construction method |
| CN108331034A (en) * | 2018-04-03 | 2018-07-27 | 上海建工七建集团有限公司 | Pier nose formula anti-float anchor rod waterproofing node and its construction method |
| CN113914316A (en) * | 2021-11-08 | 2022-01-11 | 山东元琅建设工程有限公司 | Foundation pile pressing technological process of numerical control precision machine tool |
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| CN201137162Y (en) * | 2007-12-20 | 2008-10-22 | 青建集团股份公司 | Bottom board anti-floating anchor rod water proof processing structure |
| KR100878342B1 (en) * | 2008-03-17 | 2009-01-14 | 장성덕 | Non-exposure type waterproof construction method |
| CN201695408U (en) * | 2010-02-02 | 2011-01-05 | 中国建筑第四工程局有限公司 | Basement baseplate integrating water-proofing and drainage functions |
| CN201915399U (en) * | 2010-12-28 | 2011-08-03 | 中国建筑第六工程局有限公司 | Rigid-flexible waterproof structure of head of prestressed pipe pile |
| CN102155026A (en) * | 2011-04-22 | 2011-08-17 | 吴兆圣 | Waterproof method for precast pile head |
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