CN212316900U - Precast pile construction auxiliary system and pile cap - Google Patents
Precast pile construction auxiliary system and pile cap Download PDFInfo
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- CN212316900U CN212316900U CN202020885219.5U CN202020885219U CN212316900U CN 212316900 U CN212316900 U CN 212316900U CN 202020885219 U CN202020885219 U CN 202020885219U CN 212316900 U CN212316900 U CN 212316900U
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Abstract
The utility model relates to a precast pile engineering technical field discloses a precast pile construction auxiliary system and pile cap to improve the efficiency of precast pile construction. The utility model discloses precast pile construction auxiliary system includes: the pile cap is detachably arranged at the top of the precast pile; the pile cap is provided with at least one fluid material flushing pipe and at least one row of slag discharging pipes; and the pile cap is provided with a sealing part connected with the top of the precast pile so as to form a closed space in the precast pile, wherein the closed space is used for forcing the fluid flushing pipe to flush and then mixing the slurry formed by the original substances in the pile hole, and the slurry can only be discharged from the slag discharge pipe.
Description
Technical Field
The utility model relates to a precast pile engineering technical field especially relates to a precast pile construction auxiliary system and pile cap.
Background
Precast piles, such as prestressed pipe piles, are introduced into China since the end of the last century, and because of the wide use of numerous advantages, the annual output reaches nearly 4 hundred million linear meters, the annual output value is about 700 million RMB, and the value of related construction equipment is also nearly 100 million, the precast piles are gradually popularized and developed to countries such as southeast Asia. Due to the sand-egg interlayer in a plurality of domestic areas (such as Tianjin, Shandong, Guangdong and the like), the construction process of the precast pile is difficult to penetrate due to resistance, and the production is stopped frequently to delay the construction period.
In order to break through the construction bottleneck, relevant construction methods are researched at home and abroad, but the effect is not ideal. At present, the existing solution for the resistance encountered in the construction of the precast pile is mainly a long spiral hole leading method. According to the method, before the precast pile is constructed, a long spiral is used for guiding holes according to the size of the pile diameter. Generally, the guide hole is smaller than the diameter of the pile so as to avoid damage of side friction resistance; and if the defects are caused, soil on the pipe wall is still extruded and backfilled in the subsequent construction process of the precast pile, and the prior guide hole is compacted, so that the effect is influenced. In addition, in the process of leading the hole by the long spiral, the brought-out soil can cause serious dust emission and the adverse effects of corrosion damage to construction equipment and the like. Under special conditions, if the aperture of the guide hole is larger than that of the precast pile, the side friction resistance is seriously damaged; in order to compensate the damaged side friction resistance, compensation treatment such as grouting and the like must be carried out; but also easily causes the inclination of the precast pile in the pile sinking process; thereby affecting overall performance.
Therefore, the existing long spiral pilot hole method has the defect of considering the defect. In the existing construction method, if the pressure applied to the precast pile is increased without limit through the increase of the hammering force or the increase of the balance weight, the stress structure and the like of the precast pile are damaged to influence the overall performance; meanwhile, the counterweight has inherent defects of inconvenient long-distance transportation and large noise caused by hammering.
In addition, CN203782708U discloses a device for static pressure construction of thick and thin hard sand bed concrete pipe piles, and the applicant of the same case also filed for CN103898911A static pressure construction method of thick and thin hard sand bed concrete pipe piles on the same day, and the utility model is the Wang Qing leather at the same time. The main construction process comprises the following steps: firstly, a high-pressure water pump is used for carrying out high-pressure water impact on a hard sand layer in a concrete pipe pile (2) through a high-pressure steel wire rubber hose (1) to ensure that the surface of the sand layer is soft layer by layer, a water sand suction pipe (3) is used for sucking out the sand layer, and a fine pressing machine is used for carrying out work pressurization to ensure that the pipe pile sinks. However, in the construction process of the related art, because the caliber of the water and sand suction pipe is far smaller than the internal sectional area of the pipe pile, under the impact of high-pressure water, the water and sand which can be sucked away by the water and sand suction pipe is far less than the volume of the water and sand which splashes to the outside of the pipe pile; more seriously, a large amount of mud splashed to the outside of the tubular pile is deposited and spread to a bearing area of the pile pressing machine, so that potential safety hazards are easy to occur, and the passive shutdown caused by the fact that the pile pressing machine cannot be constructed is also influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to disclose a precast pile construction auxiliary system and pile cap to improve the efficiency of precast pile construction.
In order to achieve the above object, the utility model discloses a precast pile construction auxiliary system, include:
the pile cap is detachably arranged at the top of the precast pile;
the pile cap is provided with at least one fluid material flushing pipe and at least one row of slag discharging pipes; and
the pile cap is provided with a sealing part connected with the top of the precast pile so as to form a closed space in the precast pile, wherein the closed space is used for forcing the fluid flushing pipe to flush and then mixing the slurry formed by the original substances in the pile hole, and the slurry can only be discharged from the slag discharge pipe.
In order to achieve the purpose, the utility model also discloses a pile cap which can be detachably arranged on the top of the precast pile; the pile cap is provided with at least one fluid material flushing pipe and at least one row of slag discharging pipes; and the pile cap is provided with a sealing part connected with the top of the precast pile so as to form a closed space in the precast pile, wherein the closed space is used for forcing the fluid flushing pipe to flush and then mixing the slurry formed by the original substances in the pile hole, and the slurry can only be discharged from the slag discharge pipe.
Correspond with above-mentioned precast pile construction auxiliary system and pile cap, the utility model discloses supporting precast pile construction method includes:
when the pressure application of the precast pile is invalid, deploying and starting the precast pile construction auxiliary system to impact and remove slag from original substances in the pile hole of the precast pile, and when the slag is removed to the bottom of the precast pile at the lowest stage, suspending the precast pile construction auxiliary system and applying pressure again; or
During the precast pile pressure application process (especially when the construction efficiency is lower than a specific threshold value), the precast pile construction auxiliary system is deployed and started to impact and remove slag from original substances in the precast pile hole, and when the slag is removed to the bottom of the precast pile at the lowest stage, the precast pile construction auxiliary system is suspended.
The utility model discloses following beneficial effect has:
1. the pile cap can prevent high-pressure slurry from splashing to pollute equipment, effectively prevent slurry splashed to the outside of the precast pile from silting up and spreading to a bearing area of a pile press to cause potential safety hazards, establish conditions for a subsequent gas lift reverse circulation method, facilitate continuous construction in geological complex geology such as sand and egg layers and the like, greatly reduce resistance in the precast pile construction process, improve construction efficiency and reduce the construction cost of the precast pile.
2. The precast pile is convenient to reach the design elevation, and the precast pile is prevented from being wasted.
3. The application field of the precast pile can be expanded, and the cooperative development of industrial chains of the precast pile, precast pile construction equipment and the like is driven.
4. The construction method has obvious construction advantages on the precast pile, avoids the cost of increasing the counter weight due to the increase of pile pressing force, reduces the damage to the pile body and has wider application area in the future.
5. Further, the utility model discloses the pile cap still is equipped with an at least trachea to arrange sediment through the mud of gas lift reverse circulation method helping hand to the precast pile inner chamber. It should be noted that, since the area of the inner cavity of the precast pile is much smaller than the area of the construction area of the bored pile, it is difficult for those skilled in the art to make a correlation between the precast pile construction method and the bored pile construction method, so that those skilled in the art have a technical prejudice that the gas lift reverse circulation method commonly used by the existing bored pile driver cannot be applied to precast pile construction. Therefore, the utility model discloses the scarfing cinder in precast pile stake hole is applied to the gas lift reverse circulation method that drilling bored concrete pile was commonly used, has milestone's meaning.
6. The popularization of the method opens up a simpler, more convenient, more environment-friendly and lower-cost way for the static pressure pile planting method. Furthermore, the utility model discloses precast pile construction auxiliary system still can the precast pile outside is equipped with one and connects respectively the fluid dashes the circulation system of material pipe and scum pipe. For example: the utility model discloses circulation system includes at least: a mud tank; the pump is connected between the mud box and the fluid flushing pipe; and the device is used for carrying out corresponding filtering or sedimentation treatment on the particles which are discharged by the slag discharge pipe and influence the flow velocity. Therefore, a complete circulating gas lift reverse circulation construction method is constructed, and the resource saving and the cleanness of the field are ensured; further effectively avoiding the potential safety hazard caused by the fact that the mud splashed to the outside of the precast pile is deposited and spread to the bearing area of the pile pressing machine.
7. In the construction process, whether the bottom of the precast pile leaks water can be judged by observing the slurry concentration in the slag discharge pipe or calculating the slurry amount, so that the precast pile construction auxiliary system is suspended when slag is removed to the bottom of the precast pile at the lowest stage; therefore, the problem that the construction is influenced by the fact that water leaks from the outer wall of the precast pile at the bottom of the lowest-stage precast pile.
8. The pile caps are of a detachable structure, and in a construction environment needing to adopt multi-stage precast pile cascade, when any precast pile is pressed into a target depth and a new precast pile needs to be cascaded, the precast pile construction auxiliary system is suspended, and the pile caps in the precast piles which finish stage targets are detached and are installed in the new precast pile in a shifting manner; the utilization rate of the pile cap is improved.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
fig. 1 is a schematic view of a precast pile construction auxiliary system disclosed in the embodiment of the present invention.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
Example one
The embodiment discloses a precast pile construction auxiliary system includes:
the pile cap is detachably arranged at the top of the precast pile;
the pile cap is provided with at least one fluid material flushing pipe and at least one row of slag discharging pipes; and
the pile cap is provided with a sealing part connected with the top of the precast pile so as to form a closed space in the precast pile, wherein the closed space is used for forcing the fluid flushing pipe to flush and then mixing the slurry formed by the original substances in the pile hole, and the slurry can only be discharged from the slag discharge pipe.
In this embodiment, even if the pile cap is not provided with the air tube described below; however, the sealing effect of the pile cap is matched with the high-pressure impact of the fluid material flushing pipe, and the pile cap can be regarded as a weakened gas lift reverse circulation method environment.
Optionally, this embodiment precast pile construction auxiliary system equips on the pile driver, and for the operation of being convenient for, this pile driver still further is equipped with the loading and unloading lift platform of pile cap.
Preferably, the pile cap of the embodiment is further provided with at least one air pipe for discharging slag from the slurry in the inner cavity of the precast pile by the aid of a gas lift reverse circulation method. Wherein, the trachea exposes and is connected with the air compressor machine with the part of precast pile outer end. Generally, the gas pipe can be deployed outside the slag discharge pipe; in some special applications, the gas pipe may also be integrated in the extraction pipe.
Furthermore, in this embodiment, a circulation system respectively connected to the fluid flushing pipe and the slag discharging pipe is further disposed outside the precast pile. Specifically, the circulation system may specifically include: a mud tank; the pump is connected between the mud box and the fluid flushing pipe; and the device is used for carrying out corresponding filtering or sedimentation treatment on the particles which are discharged by the slag discharge pipe and influence the flow velocity.
It is worth mentioning that: in actual operation, the mud tank is originally assembled with prepared mud with a prepared concentration or water. If the original water is filled in the slurry tank, the slurry tank impacts the original substances in the precast pile under the high-pressure conveying of the pump to form slurry; in addition, in the construction process, chemical agents such as caustic soda and the like can be added into the slurry tank according to the concentration condition of the slurry so as to optimize the performances such as the impact property, the fluidity and the like of the fluid.
As shown in fig. 1, an optional auxiliary system for precast pile construction in this embodiment includes: the device comprises a fluid flushing pipe 1, a pile cap 2, a pile cap sealing part 3, an air pipe 4, a slag discharge pipe 5, a pump 6, a filter 7, a mud pit 8 and a tubular pile 10.
Example two
The present embodiment discloses a pile cap, which is matched with the auxiliary system for precast pile construction in the above embodiments.
The embodiment can be detachably arranged at the top of the precast pile; the pile cap is provided with at least one fluid material flushing pipe and at least one row of slag discharging pipes; and the pile cap is provided with a sealing part connected with the top of the precast pile so as to form a closed space in the precast pile, wherein the closed space is used for forcing the fluid flushing pipe to flush and then mixing the slurry formed by the original substances in the pile hole, and the slurry can only be discharged from the slag discharge pipe.
Furthermore, the pile cap of the embodiment is also provided with at least one air pipe so as to discharge slag from the slurry in the inner cavity of the precast pile by the aid of the gas lift reverse circulation method. Similarly, generally, the gas pipe can be deployed outside the slag discharge pipe; in some special applications, the gas pipe may also be integrated in the extraction pipe.
EXAMPLE III
In addition, the present embodiment discloses a precast pile construction method, which is matched with the precast pile construction auxiliary system in the above embodiments, and includes:
when the pressure application of the precast pile is invalid, the precast pile construction auxiliary system is deployed and started to impact and remove slag from original substances in the pile hole of the precast pile, and when the slag is removed to the bottom of the precast pile at the lowest stage, the precast pile construction auxiliary system is suspended and the pressure is applied again.
As a variation, the method of the present embodiment may also be:
during the precast pile pressure application process (especially when the construction efficiency is lower than a specific threshold value), the precast pile construction auxiliary system is deployed and started to impact and remove slag from original substances in the precast pile hole, and when the slag is removed to the bottom of the precast pile at the lowest stage, the precast pile construction auxiliary system is suspended. Namely, in the process of hammering outside or static pressure by a counterweight, external force application can be synchronously carried out with slag removal inside the precast pile.
In the construction environment needing to adopt the cascade connection of the multistage precast piles, when any precast pile is pressed into the target depth and a new precast pile needs to be cascaded, the precast pile construction auxiliary system is suspended, and the pile cap in the precast pile which finishes the stage target is detached and is installed in the new precast pile in a shifting way.
To sum up, the utility model discloses the precast pile construction auxiliary system and pile cap and supporting construction method that each above-mentioned embodiment disclosed respectively have following beneficial effect:
1. the pile cap can prevent high-pressure slurry from splashing to pollute equipment, effectively prevent slurry splashed to the outside of the precast pile from silting up and spreading to a bearing area of a pile press to cause potential safety hazards, establish conditions for a subsequent gas lift reverse circulation method, facilitate continuous construction in geological complex geology such as sand and egg layers and the like, greatly reduce resistance in the precast pile construction process, improve construction efficiency and reduce the construction cost of the precast pile.
2. The precast pile is convenient to reach the design elevation, and the precast pile is prevented from being wasted.
3. The application field of the precast pile can be expanded, and the cooperative development of industrial chains of the precast pile, precast pile construction equipment and the like is driven.
4. The construction method has obvious construction advantages on the precast pile, avoids the cost of increasing the counter weight due to the increase of pile pressing force, reduces the damage to the pile body and has wider application area in the future. The tonnage of the existing pile pressing machine is mostly over 600 tons, and the tonnage of the known main machine type is up to 1060 tons. Wherein the weight fraction is large. The bearing requirements on the construction site are extremely high. The embodiment can play a role in reducing the counter weight and accords with the technical trend of building two societies of resource conservation and environmental friendliness at present.
5. Further, the utility model discloses the pile cap still is equipped with an at least trachea to arrange sediment through the mud of gas lift reverse circulation method helping hand to the precast pile inner chamber. It should be noted that, since the area of the inner cavity of the precast pile is much smaller than the area of the construction area of the bored pile, it is difficult for those skilled in the art to make a correlation between the precast pile construction method and the bored pile construction method, so that those skilled in the art have a technical prejudice that the gas lift reverse circulation method commonly used by the existing bored pile driver cannot be applied to precast pile construction. Therefore, the utility model discloses the scarfing cinder in precast pile stake hole is applied to the gas lift reverse circulation method that drilling bored concrete pile was commonly used, has milestone's meaning.
6. The popularization of the method opens up a simpler, more convenient, more environment-friendly and lower-cost way for the static pressure pile planting method. Furthermore, the utility model discloses precast pile construction auxiliary system still can the precast pile outside is equipped with one and connects respectively the fluid dashes the circulation system of material pipe and scum pipe. For example: the utility model discloses circulation system includes at least: a mud tank; the pump is connected between the mud box and the fluid flushing pipe; and the device is used for carrying out corresponding filtering or sedimentation treatment on the particles which are discharged by the slag discharge pipe and influence the flow velocity. Therefore, a complete circulating gas lift reverse circulation construction method is constructed, and the resource saving and the cleanness of the field are ensured; further effectively avoiding the potential safety hazard caused by the fact that the mud splashed to the outside of the precast pile is deposited and spread to the bearing area of the pile pressing machine. The utility model creatively applies the mud box and the gas lift reverse circulation method to the field of the construction of the preset pile engineering; greatly improving the construction efficiency.
7. In the construction process, whether the bottom of the precast pile leaks water can be judged by observing the slurry concentration in the slag discharge pipe or calculating the slurry amount, so that the precast pile construction auxiliary system is suspended when slag is removed to the bottom of the precast pile at the lowest stage; therefore, the problem that the construction is influenced by the fact that water leaks from the outer wall of the precast pile at the bottom of the lowest-stage precast pile.
8. The pile cap adopts a detachable structure, and in a construction environment needing to adopt the cascade of the multistage precast piles, when any precast pile is pressed into a target depth and needs to cascade a new precast pile, the precast pile construction auxiliary system is suspended, and the pile cap in the precast pile which finishes a stage target is detached and is arranged in the new precast pile in a shifting way, so that the utilization rate of the pile cap is improved.
In addition, based on experimental data of the existing scene of the patent, compared with the same geological region, the efficiency improvement of the construction method of the patent on the pile pressing construction period can be improved by more than 30% above the existing construction method; and can meet the requirement of continuous construction in most areas; can be widely popularized at home and abroad.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A precast pile construction auxiliary system, comprising:
the pile cap is detachably arranged at the top of the precast pile;
the pile cap is provided with at least one fluid material flushing pipe and at least one row of slag discharging pipes; and
the pile cap is provided with a sealing part connected with the top of the precast pile so as to form a closed space in the precast pile, wherein the closed space is used for forcing the fluid flushing pipe to flush and then mixing the slurry formed by the original substances in the pile hole, and the slurry can only be discharged from the slag discharge pipe.
2. The auxiliary system for precast pile construction as recited in claim 1, wherein the pile cap is further provided with at least one air pipe for discharging residue from slurry in the inner cavity of the precast pile by assistance of a gas lift reverse circulation method.
3. A precast pile construction auxiliary system according to claim 1 or 2, wherein a circulation system respectively connecting the fluid flushing pipe and the slag discharge pipe is provided outside the precast pile.
4. A precast pile construction assistance system according to claim 3, wherein the circulation system includes at least:
a mud tank;
the pump is connected between the mud box and the fluid flushing pipe; and
and the device is used for carrying out corresponding filtering or sedimentation treatment on the particles which are discharged by the slag discharge pipe and influence the flow velocity.
5. The precast pile construction auxiliary system according to claim 4, wherein the precast pile construction auxiliary system is equipped on a pile press machine, and a lifting platform for loading and unloading the pile cap is further provided on the pile press machine.
6. A pile cap is characterized in that the pile cap can be detachably arranged on the top of a precast pile;
the pile cap is provided with at least one fluid material flushing pipe and at least one row of slag discharging pipes; and
the pile cap is provided with a sealing part connected with the top of the precast pile so as to form a closed space in the precast pile, wherein the closed space is used for forcing the fluid flushing pipe to flush and then mixing the slurry formed by the original substances in the pile hole, and the slurry can only be discharged from the slag discharge pipe.
7. The pile cap of claim 6, further comprising at least one air tube for removing the residue from the slurry in the inner cavity of the precast pile by the aid of the air lift reverse circulation method.
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| CN202020885219.5U CN212316900U (en) | 2020-05-22 | 2020-05-22 | Precast pile construction auxiliary system and pile cap |
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| CN202020885219.5U CN212316900U (en) | 2020-05-22 | 2020-05-22 | Precast pile construction auxiliary system and pile cap |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114108622A (en) * | 2021-11-10 | 2022-03-01 | 陶德明 | Assembled static pressure concrete anchor rod |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114108622A (en) * | 2021-11-10 | 2022-03-01 | 陶德明 | Assembled static pressure concrete anchor rod |
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