我方根据现场实际需要及地质勘查报告等研究对比分析，认为采用锤击桩沉桩更

我方根据现场实际需要及地质勘查报告等研究对比分析，认为采用锤击桩沉桩更符合现场实际的需要，更加有利于对PC桩施工质量及进度的控制，现将该对比分析报告整理如下：
1.采用静压桩固然可以减小打桩时的震动，但其仍然是依靠挤土成桩，所以不能从根本上解决PC桩施工过程中所产生的挤土效应及对周围建筑物的影响。
2.静压法成桩是依靠静力压桩机自重和机架上的配重提供反力而将PC桩压入到土中，一般而言，静力压桩机自重及其配重之和约是桩端极限承载力的1.5倍，以施工的烟囱区域为例，其桩端设计极限承载力为4000KN，也即约400吨，则压桩机及配重之和约600吨，而锤击桩机自重仅为60吨，故静力压桩机在行走和施工过程中对现场道路及场地破坏更为严重，桩施工进度和安全将受到一定的影响，特别是当地又逢雨天较多，雨水过后，地面较为松软，“笨重”的静力压桩机移动将会非常困难，甚至会导致设备故障等，致使打桩进度进一步恶化，相比较而言“质轻”的锤击桩机对施工场地的要求较低，也更为灵活，克服外部环境不利影响的能力也更强，就现场实际情况及需要而言，锤击桩施工的进度远优于静压桩。
3.由于PC桩成桩机理是通过挤土成桩，正在施工的桩对已完成的桩的侧向剪压力与两者之间的距离有关，距离越近则侧向剪压力越大，以施工的烟囱区域为例，该区域PC桩分布较密，成桩时挤土效应明显，会对已完成的桩产生较大的侧向剪应力，如若采用静压法施工，由于静力压桩机及其上配重的巨大重量使其在行走和施工过程中会对已完成的桩产生较大的侧向剪应力，从而加剧PC桩桩身所承受的剪应力，使得桩身某一处侧向剪压力过大，从而造成桩身偏移，甚至断桩的情况（见附页：静力压桩机施工时主要作用力示意图），相比较而言，采用锤击法施工，锤击桩机较轻的重量对已完成的桩所产生侧向剪应力较小，为保证成桩质量，应优先选择锤击桩来施工。
4.采用锤击桩施工，进入砂层面时，砂层在桩端的冲击力和震动的作用下，会产生液化，抗阻能力降低，桩身所受的摩阻力比采用静压桩会明显减小，从而增加了桩端穿透砂层的能力，而静压桩在进入砂层面时，阻力过大，施工进尺困难，而且压力值会陡然上升，可能会造成桩身及设备的破坏，以烟囱区域为例，该区域地质勘探孔，孔编号S-48、49、50的数据表明在地面以下30m到50m的范围内广范分布着高强度压缩的砂层（见附页：烟囱区域地质勘察报告），会给静压桩的进尺带来非常大的困难，所以应优先选择采用锤击桩来施工。
综上所述，根据现场实际情况以及地质勘查报告的数据可知，采用锤击桩来施工更加符合现场的实际需要，更加有利于保证施工质量，更加有利于加快施工进度。

結果 (英文) 1:

According to practical needs and comparative analysis of geological exploration report and other studies, using hammer pile driving more responsive to actual needs, and more in favour of PC pile construction quality and progress control, the comparative analysis report is as follows:1. static pressure pile is allowed to reduce the shock of driving, but it is still dependent on soil compaction pile, so we cannot fundamentally solve the arising during the construction of PC pile soil compaction effect and its effect on surrounding buildings.2. static pressure static pile of pile depend on weight and counterweight at the rack to provide force PC-piles into the ground, generally speaking, Static pressure pile machine weight and distribution heavy of peace is pile end limit hosted force of 1.5 times times, to construction of chimney regional for cases, its pile end design limit hosted force for 4000KN, also that about 400 tons, is pressure pile machine and the distribution heavy of peace 600 tons, and hammer hit pile machine weight only for 60 tons, so static beat pile machine in walking and construction process in the on site road and the site damage more serious, pile construction progress and security will by must of effect, especially local and every rainy day more, rain after, ground more soft, " Heavy "of static beat pile machine Mobile will will very difficult, even will led to equipment fault,, led piling progress further deterioration, phase compared," quality light "of hammer hit pile machine on construction site of requirements lower, also more flexible, overcome external environment adverse effect of capacity also more strong, on site reality and the need,, hammer hit pile construction of progress far is better than static pressure pile.3. due to PC pile into pile mechanism is through squeeze soil into pile, is construction of pile on has completed of pile of side to cut pressure and both Zhijian of distance about, distance more near is side to cut pressure more big, to construction of chimney regional for cases, the regional PC pile distribution more key, into pile Shi squeeze soil effect obviously, will on has completed of pile produced larger of side to shear stress, if used static pressure method construction, due to static beat pile machine and Shang distribution heavy of huge weight makes its in walking and construction process in the will on has completed of pile produced larger of side to shear stress , To increased PC pile pile body by bear of shear stress, makes pile body a a at side to cut pressure had big, to caused pile body offset, even broken pile of situation (see attached page: static beat pile machine construction Shi main force schematic), phase compared,, used hammer hit method construction, hammer hit pile machine more light of weight on has completed of pile by produced side to shear stress smaller, for guarantee into pile quality, should priority select hammer hit pile to construction.4. used hammer hit pile construction, into sand level Shi, sand layer in pile end of impact and vibration of role Xia, will produced liquefied, anti-resistance capacity reduced, pile body by by of motorcycle resistance than used static pressure pile will obviously reduced, to increased has pile end penetrating sand layer of capacity, and static pressure pile in into sand level Shi, resistance had big, construction footage difficult, and pressure value will suddenly rose, may will caused pile body and the equipment of damage, to chimney regional for cases, the regional geological exploration hole, hole number S-48, and 49, and 50 data indicate that below the surface within the range of 30m to 50m wide distribution of high compacted sand layer (see attached sheet: regional geology investigation report of the chimney), static pressure pile of footage will bring very big difficulties, so the driven pile construction should be preferred. To sum up, according to the situation and report of the geological exploration data, driven pile construction is more in line with actual needs, more conducive to ensuring construction quality and more conducive to accelerating the construction schedule.

結果 (英文) 2:

According to the study we compare the actual site needs analysis and geological exploration reports, that the use of hammering Piles site more in line with actual needs, more conducive to the construction quality and progress control PC pile, now that the comparative analysis are summarized as follows :
1. Using Static Pile of course, you can reduce shock when the piling, but it still relies on soil compaction pile, it can not solve the construction process of squeezing effect produced pile PC and its effect on the surrounding buildings from the fundamental .
2. Static pile method is to rely on static pile driver weight and weight distribution on the rack to provide a reaction force of the PC pile is pressed into the soil, in general, static pile driver weight and counterweight of is about 1.5 times the ultimate bearing capacity of the pile end to the construction of the chimney area, for example, designed its ultimate bearing capacity of the pile end 4000KN, that is about 400 tons, about the weight of the pile and then press 600 tons, while hammering Pile weight of only 60 tons, so the static pile driver walking and construction process and on-site road space more serious damage, pile construction progress and security will be some impact, especially local rain has stimulated more, After the rain, the ground is more soft, "heavy" static pile driver will be very difficult to move, and even cause equipment failure, resulting in further deterioration of piling progress, comparatively speaking, "light" hammering pile driver construction low space requirements, but also more flexible, to overcome the adverse effects of the external environment more capacity, the actual situation and needs, the progress hammering piles is far superior to the static pressure piles.
3. Because PC Pile mechanism by soil compaction pile, the pile of completed lateral cut pile under construction and the distance between the two pressure-related, the greater the closer the lateral shear stress to Construction of the chimney area, for example, the distribution is more dense area PC pile, the pile when squeezing effect obviously, will have a greater pile of completed lateral shear stress, should the use of static pressure method construction, since static piling machine and the counterweight of enormous weight in walking and it would have been completed during the construction pile greater lateral shear stress, thereby increasing the shear stress suffered by PC pile, so the pile somewhere lateral shear stress, causing the pile shifted, even broken pile of the case (see page: hydrostatic pressure forces a schematic of the main pile construction), comparatively speaking, construction method using hammering, hammering Pile lighter weight of the completed pile lateral shear stress generated by smaller, in order to ensure the quality of pile, hammering piles should give priority to the construction.
4. Using hammering piles, when entering the sand level, the sand pile at the end of the impact and vibration, will produce liquefied, the ability to reduce resistance, friction resistance pile suffered ratio will be significantly reduced hydrostatic pile small, thereby increasing the capacity of the pile tip to penetrate sand, and static pressure piles into the sand at the level of resistance is too large, difficult construction footage, and pressure will rise suddenly, it may cause damage pile and devices to chimney area, for example, the regional geological exploration holes, hole No. S-48,49,50 data show that in the range of 30m to 50m below the surface distribution of the wide range of high-strength compressed sand (see page: chimney regional geology survey report), static pressure pile of footage will bring great difficulties, we should give priority to the use of hammering piles construction.
In summary, according to the actual situation as well as data field geological survey report shows that the use of hammering piles need to be more in line with actual construction site, more conducive to ensure the construction quality, more conducive to speed up the construction schedule.

結果 (英文) 3:

According to the actual needs of the field and geological survey report, we believe that the use of hammer hammer pile is more in line with the actual needs, and more conducive to the construction quality and progress of the PC pile, the report is as follows:
1. static pressure pile can reduce the vibration, but it is still rely on the pile, it can not fundamentally solve the PC pile construction process and the impact of the surrounding buildings.
2. Method of static pressure pile is to rely on static pressure pile machine weight and frame counterweight to provide anti Force PC pile is pressed into the soil, in general.Walking in the design limits is the static pile pressing machine weight and balance weight of approximately pile limit bearing capacity of 1.5 times to construction of chimney region as an example, the pile tip bearing capacity of 4000kn, or about 400 tons, the pile pressing machine and weight of approximately 600 tons, and the hammer pile machine weight is only 60 tons, so static pressure pile machine and construction process of roads on site and site failure is more serious, pile construction schedule and safety will be subject to certain impact, especially local stimulated more rain, after the rain, the ground is more soft, "heavy" of static pressure pile machine mobile will be very difficult, or even lead to equipment failure, resulting in piling progress further deterioration.In comparison, the "quality and light" hammer hammer pile machine to the construction site requirements is lower, but also more flexible, to overcome the adverse effects of external environment, the ability is stronger, on the actual situation and needs, the construction progress of the hammer hammer is better than static pressure pile. The mechanism of PC pile is that the lateral shear stress of piles is related to the distance between the piles and the soil. The more the distance is, the larger the lateral shear pressure is. The
3. pile is PC,Due to the static pile pressing machine and the weight of the great weight of the walking and construction process of finished piles have larger lateral shear stress, thus exacerbating the PC pile under shear stress, making pile a lateral shear pressure is too large, resulting in pile offset, and even broken pile (see attached sheet: static pressure pile machine construction main force diagram), compared with hammering method construction, hammering pile machine lighter weight of finished piles produced by lateral shear stress is small, in order to ensure the pile quality, priority should be given to the selection of hammer hammer pile construction.
4. using hammer hammer pile construction, into the sand layer,Range, S-48 into piles in sand layer side of the impact force and vibration, will produce liquefaction resistance ability is reduced, the pile body frictional resistance than the static pressure pile will be significantly reduced, thereby increasing the pile end penetrates the sand, and the static pressure pile in into the sand level, the resistance is too large, the construction scale is difficult, and the pressure value will rise abruptly, possibly will cause the pile body and equipment damage to chimney region as an example, the regional geological exploration hole, hole number 49 and 50 of the data shows that in the ground below 30m to 50m wide range distribution with high compression strength of sand (see attached sheet: chimney regional geological survey report).Will bring great difficulties to the pile penetration, so should choose to use the hammer pile construction. In summary, according to the actual situation in the field and geological survey report of the data, the use of hammer hammer pile to the construction is more in line with the actual needs of the scene, more conducive to the construction quality, more conducive to accelerate the construction progress.