CN1158432C - High-pressure mortar spraying deposition process of prefabricated steel bar reinforced concrete pile - Google Patents
High-pressure mortar spraying deposition process of prefabricated steel bar reinforced concrete pile Download PDFInfo
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- CN1158432C CN1158432C CNB011271698A CN01127169A CN1158432C CN 1158432 C CN1158432 C CN 1158432C CN B011271698 A CNB011271698 A CN B011271698A CN 01127169 A CN01127169 A CN 01127169A CN 1158432 C CN1158432 C CN 1158432C
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- pipeline
- mortar spraying
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Abstract
The present invention relates to a sinking technology of a prefabricated steel bar reinforced concrete pile, which approximately comprises the following steps: a mortar spraying pipeline is previously buried or put into the prefabricated steel bar reinforced concrete pile; a static pile pressing process or a hammering pile sinking process, cement mortar can enter the end of the pile through the mortar spraying pipeline, and then the high pressure spraying in process of the earth mass of the end of the pile is carried out; the end of the pile can be successfully pressed into or penetrated through the earth mass to enter prearranged pile pressing depth by temporarily increasing the water pressure of the pressed earth mass and enhancing the compression performance of the pressed earth mass.
Description
Affiliated technical field
The present invention relates to a kind of pile-sinking method of precast reinforced concrete piles.
Background technology
The compression performance that the pile sinking degree of depth of the pile-sinking method (armful pressure and the preloading pile sinking that comprise paddle type mill pile sinking, silent piling) that precast reinforced concrete piles is traditional often is pressed into the soil body limits, and only is applicable to that generally high-compressibility (refers generally to compression coefficient greater than 0.5mpa
-1) the mucky soil body, and be to be difficult to the stake end is sunk to the predetermined degree of depth to traditional pile-sinking method of employing such as the silty clay of contracting property of tool mesolow, fine sand layer, sandy gravel stratums, limited the applicability of precast reinforced concrete piles significantly.There is a kind of prebored hole to fetch earth now to plant piling method and can addresses the above problem, this method is to adopt the drilling bucket rig to carry out boring extracting soil before pile sinking earlier on the stake position, promptly on the stake position, bore an aperture and the essentially identical stake of stake footpath size hole, drilling depth must be passed the soil body of piling difficulty, with pile press precast reinforced concrete piles is pressed into projected depth along the stake hole of having bored then.This method has solved the pile sinking difficulty in contracting property of the mesolow soil body, has reduced the soil compaction effect in the piling process, but also exists shortcoming: 1 rig that adopts easily causes surface collapse, difficulty in walking from great; 2 construction machinery fuel consumption are big, piling cost height.
Summary of the invention
The objective of the invention is to overcome the above-mentioned defective of prior art, the pile-sinking method of a kind of easy construction, precast reinforced concrete piles that cost is low is provided.
Method of the present invention is roughly as follows: pre-buried or pre-open flow slurry pipeline in precast reinforced concrete piles, in silent piling or hammer piling process, making cement grout enter into the stake end and the stake end soil body is carried out high pressure by the whitewashing pipeline sprays into, the interim water pressure that increases gravel soils, improve the compression performance of gravel soils, thereby make the stake end be pressed into or pass the soil body smoothly and enter into the predetermined piling degree of depth.
The present invention has following advantage:
1, the pile sinking condition and the scope of application of precast reinforced concrete piles have been widened.Adopt traditional pile pressing method to require the compression coefficient of the soil body generally should be greater than 0.5mpa
-1, and adopt the compression coefficient of the soil body after the method for the present invention can be less than 0.3mpa
-1
2, the high-pressure mortar spraying cement grout that sprays into the soil body is diffused in the pile peripheral earth, has improved the physical property of the soil body, generally can make the compression performance of the soil body improve about 50% (as the compression coefficient of farinose argillic horizon be 0.3mpa
-1About, its compression coefficient can be brought up to 0.5mpa behind high-pressure mortar spraying
-1More than).
3, after piling is finished, it is fixed that cement grout can make the soil body in stake week produce, and strengthened the cohesive force of the soil body, thereby improve the bearing capacity of stake.
4, can reduce the pile driving pressure of pile press, improve pile sinking speed.According to the job site relatively, as gravel soils is the loam layer, before not adopting the inventive method, the force value of piling reaches more than the 22mpa, piling speed was less than 5cm/ minute, and after employing the inventive method, the force value of pile press is reduced to 15mpa, and piling speed was brought up to more than 30cm/ minute.
5, adopt the inventive method can reduce operating expenses, reduce environment pollution.Compare the direct cost 10% that can reduce piling with traditional pile pressing method, fetch earth with prebored hole and plant piling method and compare the direct cost 30% that can reduce piling.
6, the required equipment of the inventive method is simple, to equipment require low.
Description of drawings
Further illustrate detailed content of the present invention below in conjunction with drawings and Examples.
Fig. 1: present embodiment method schematic diagram;
Fig. 2: hollow square pile is laid whitewashing pipeline schematic diagram;
Fig. 3: the open circles pile tube is laid whitewashing pipeline schematic diagram;
Fig. 4: hollow square pile is reserved whitewashing pipeline schematic diagram;
Fig. 5: whitewashing pipeline schematic diagram is reserved in solid side's stake;
Fig. 6: the connection diagram of pipeline and gunite gun in the pile body;
Fig. 7: the structural representation of gunite gun;
Fig. 8: the connection diagram of stake top portion pipeline during pre-buried pipeline in the pile body;
Fig. 9: the connection diagram of stake top portion pipeline when temporarily laying pipeline in the hollow pile;
Figure 10: the configuration diagram of pipeline connector.
The specific embodiment
Concrete grammar of the present invention is as follows:
1, in the prefabricated pile body 1 of reinforced concrete, lays whitewashing pipeline 2.Reinforced concrete precast hollow stake to all size section both can be reserved the whitewashing passage in pile body when making stake, also can the hollow part in stake lay the whitewashing pipeline when piling temporarily, can take out after mud jacking finishes for the pipeline of laying temporarily again and use.Solid pile to all size section must be reserved spray prize pipeline in pile body when making stake.Fig. 2 is a schematic diagram of temporarily laying the whitewashing pipeline at hollow square pile, Fig. 3 is a schematic diagram of temporarily laying the whitewashing pipeline at the open circles pile tube, Fig. 4 is a schematic diagram of reserving the whitewashing pipeline at hollow square pile, when in this pile body, laying the whitewashing pipeline, can in an angle, lay, also can lay in a plurality of angles, generally can lay 1-4 whitewashing pipeline, Fig. 5 is a schematic diagram of reserving the whitewashing pipeline in solid side's stake.To adopt when in the stake of reinforced concrete precast hollow, laying merogenesis to connect temporarily.Stake end at the reinforced concrete preformed pile is provided with gunite gun 3, the about 100-500MM of length, and the best is 100MM, and is connected (Fig. 6) with the interior whitewashing pipeline 2 of pile body 1.Wherein gunite gun 3 adopts thick walled steel tubes to make, structure as shown in Figure 7, it is a tubular structure, head is the closed circular taper, is provided with the damped ring 31 of some circles in the outside of tube wall and offers some gunniting holes 32 on tube wall.Be provided with a fixator 7 pipeline 2 of will whitewashing at the top of stake and be fixed in the pile body 1, squeeze on the pipeline when preventing piling, fixator 7 is for end cover structure and be provided with fixed structure and be fixed on the pile body 1.The side that its fixed structure is included in fixator 7 in the present embodiment is provided with through hole, is provided with steady pin 71 in the through hole fixator 7 is fixed on the pile body.For the whitewashing pipeline of in the reinforced concrete preformed pile, reserving, also a connector 8 to be installed at the top of pile body 1, connector 8 was connected the pipeline 2 in ground pipeline 9 and the pile body 1 and fixed the top that 7 devices are fixed on pile body 1.The structure of connector 8 as shown in figure 10, its two ends are respectively equipped with an interior pipeline link 81 and a fixator link 82, middle connect by rubber gasket 83, the pipeline 2 that pipeline link 81 connects in the pile bodies 1 in the stake, fixator link 82 connect ground pipelines 9 and link to each other with fixator 7.
2, the preparation of cement grout: adopt cement paste agitator 6 to mix the system cement grout, the water/binder ratio of cement paste can be drafted according to the Penetration Signature of the soil body, soil body preparation thin pulp to poor permeability, the soil body to good penetrability can suitably be prepared underflow, the slurry water gray scale can be matched in the scope of 0.25-5, the general water/binder ratio that adopt 1-2 more.
3, ground pipeline 9 is connected with high-pressure mortar spraying pump 5, the cement grout that configures is injected into ground pipeline 9 and makes the cement grout high pressure enter into the whitewashing pipeline 2 of pile body 1 by ground pipeline 9 by high-pressure mortar spraying pump 5, when 5 work of high-pressure mortar spraying pump, the gunite gun 3 of whitewashing pipeline 2 ends is a high-pressure mortar spraying.Simultaneously pile body 1 is installed on pile press 4,5 work of high-pressure mortar spraying pump can be carried out high-pressure mortar spraying and pile sinking synchronously when 4 pairs of pile body 1 pilings of pile press.When the stake end is pressed into the relatively poor soil layer of compression performance, when pile body is difficult to sink, begin whitewashing.Its method is pile sinking while whitewashing, and whitewashing is carried out synchronously with pile sinking, and the pressure of high-pressure mortar spraying is decided on the speed of pile sinking and the pressure of pile press, when the force value of pile press higher, when pile sinking speed is very slow again, should strengthen spray pressure, make the force value of pile press and pile sinking speed normal till.General spray pressure can be regulated in the 0.5Mpa-50Mpa scope, and best 20Mpa is advisable.Pile press adopts static pile press in the present embodiment; also can adopt roof pressure pile sinking and sunk by hammer; if when adopting roof pressure pile sinking and sunk by hammer,, can adopt method of the present invention to carry out pile sinking equally as long as add the protective device of a whitewashing pipeline at the top of stake.Its method method is the same.
Claims (9)
1, a kind of precast reinforced concrete piles high-pressure mortar spraying pile-sinking method, it is characterized in that: pre-buried or pre-open flow slurry pipeline (2) in precast reinforced concrete piles (1), in piling or pile driving process, make cement grout enter into the stake end and the stake end soil body is carried out high pressure and spray into by the pipeline of whitewashing (2).
2, a kind of precast reinforced concrete piles high-pressure mortar spraying pile-sinking method according to claim 1 is characterized in that: be provided with gunite gun (3) at the stake end and be connected with whitewashing pipeline (2) in the stake, cement grout is by the ejection of gunite gun (3) high pressure.
3, a kind of precast reinforced concrete piles high-pressure mortar spraying pile-sinking method according to claim 2, it is characterized in that: described gunite gun (3) adopts thick walled steel tube to make, be tubular structure, head is the closed circular taper, is provided with the damped ring (31) of some circles in the outside of tube wall and offers some gunniting holes (32) on tube wall.
4, a kind of precast reinforced concrete piles high-pressure mortar spraying pile-sinking method according to claim 1 and 2 is characterized in that: be provided with a fixator (7) pipeline (2) of will whitewashing at the top of pile body (1) and be fixed in the pile body (1).
5, a kind of precast reinforced concrete piles high-pressure mortar spraying pile-sinking method according to claim 4 is characterized in that: fixator (7) is for end cover structure and be provided with fixed structure and be fixed on the pile body (1).
6, a kind of precast reinforced concrete piles high-pressure mortar spraying pile-sinking method according to claim 5, it is characterized in that: at the top of pile body (1) connector (8) is installed also, connector (8) is fixed on the top of pile body (1) with the fixator (7) that was connected of the whitewashing pipeline (2) in ground pipeline (9) and the pile body (1).
7, a kind of precast reinforced concrete piles high-pressure mortar spraying pile-sinking method according to claim 6, it is characterized in that: its two ends of described connector (8) are respectively equipped with an interior pipeline link (81) and fixator link (82), the centre connects by rubber gasket (83), pipeline link (81) connects the pipeline (2) in the pile body (1) in the stake, and fixator link (82) connects ground pipeline (9) and links to each other with fixing (7) device.
8, a kind of precast reinforced concrete piles high-pressure mortar spraying pile-sinking method according to claim 1, it is characterized in that: its water/binder ratio of described cement grout can be matched in the scope of 0.25-5.
9, a kind of precast reinforced concrete piles high-pressure mortar spraying pile-sinking method according to claim 1, it is characterized in that: spray pressure can be regulated in the 0.5Mpa-50Mpa scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011271698A CN1158432C (en) | 2001-09-01 | 2001-09-01 | High-pressure mortar spraying deposition process of prefabricated steel bar reinforced concrete pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011271698A CN1158432C (en) | 2001-09-01 | 2001-09-01 | High-pressure mortar spraying deposition process of prefabricated steel bar reinforced concrete pile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1335434A CN1335434A (en) | 2002-02-13 |
| CN1158432C true CN1158432C (en) | 2004-07-21 |
Family
ID=4667157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011271698A Expired - Fee Related CN1158432C (en) | 2001-09-01 | 2001-09-01 | High-pressure mortar spraying deposition process of prefabricated steel bar reinforced concrete pile |
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|---|---|
| CN (1) | CN1158432C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102605767A (en) * | 2012-03-27 | 2012-07-25 | 浙江大学城市学院 | Precast pile reserved with grouting pipe and piling process of precast pile |
| CN102767173B (en) * | 2012-07-09 | 2014-05-07 | 河海大学 | High polymer material slurry filled discrete material pile composite foundation and construction method thereof |
| CN106930273A (en) * | 2017-03-17 | 2017-07-07 | 济南轨道交通集团有限公司 | Stake technique and prefabricated pile are planted in one kind drilling high pressure draught vibration |
| CN109778857A (en) * | 2018-11-30 | 2019-05-21 | 北京荣创岩土工程股份有限公司 | A kind of prefabricated pile is from pilot hole device and prefabricated pile from pilot hole pile making method |
-
2001
- 2001-09-01 CN CNB011271698A patent/CN1158432C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1335434A (en) | 2002-02-13 |
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