FROM EXPERIENCE OF CONSTRUCTION ORGANIZATIONS
IMPROVEMENT IN EQUIPMENT FOR LAYING
FOUNDATIONS IN RAMMED DOWN
FOUNDATION PITS
Yu. E. Ponomarenko, M. V. Maksimov, UDC 624.152
V. i. Krutov, and L. V. Erofeev
Specifications of NOVK-8/14
Base machine Crane RDK-250
Stamp weight, tons 8
stamp height, m 3.5
Diameter of circle circumscribed by stamper, m
by top part 1.35
by bottom part 0.80
Maximum release height of stamper, m 14
Maximum energy of impact, kJ 1100
force for stamper extraction, kN 250
block-and-tackle ratio
in with drawing stamper from soil
in lifting stamper along guide column
Translated from Osnovaniya, Fundamenty i Mekhanika Gruntov, No. 6, pp. 19-21, November-December, 1991.
0038-0741/91/2806-0256512.50 . ! 992 Plenum Publishing Corporation
Method of Adjusting vertical position of column Hydraulic
Range of adjustment, degree + l °30'
Method of lifting guide column Hydraulic
lift of guide column, m 0.6
Overall dimensions at working position, m
height 19. l
width 3.15
length 9.03
Specific pressure on soil, kPa 12
The NOVK-8/14 consists of the following: guide column; cap; hinged joint, suspension; mechanism tbr directing the stamper on to the tbundation pit axis; rear carriage; circular sling; rammer with carriage; gripping device; ail station; column lifting hydraulic cylinder.
The guide column is a box-like structure fabricated out of slotted l-beam and consists of the bottom and top parts connected by means of flanges. Three hinged brackets are provided on the column for releasing the rammer from 7, 9, and 14 m heights. At the bottom, the column is connected with the base by means of a ball pivot, and at the top is the cap with branch blocks.
The suspension is fitted in place of the jib cap of crane RDK-250. The guide column is mounted on the suspension by means of the hinged joint.
The directing mechanism is designed in the form of a telescopic pipe with hydraulic cylinders tbr longitudinal and transverse swinging of the guide column. At one end, it is hinge jointed with the moving part of the base machine and, at the other (which terminates in a yoke), with the guide column by means of runners. The column lifting hydraulic cylinder is fitted
on the yoke and is secured to it by means of the cylinder rod. The yoke is connected with the hinged joint with a circular sling. Therefore, when the hydraulic cylinder rod moves out, the circular sling is pulled up and the column moves upward relative to the runners of the yoke and the hinged joint.
The stamper is fabricated out of steel plates and is filled with concrete for making up the required weight. It is hinged jointed with the carriage. A damping device is fitted between the carriage and stamper. The carriage along with the stamp moves on rollers relative to the column and is retained in the column by means of renewable stops which can be replaced as
they wear out. Deviation of the stamp center from the would-be tbundation pit is not more than 3 cm and angle of turn of the axes is not more than 5 ° 14l.
The gripping device is meant tbr coupling the carriage with the stamper, lifting them upward by the winch of the base machine, and automatically releasing them after the required height is attained. The rear carriage is tbr selecting the cable tbr
changing the ratio of the block-and-tackle.
The hydraulic cylinders are operated from the additional oil station which includes a hydraulic tank, pump, and asynchronous motor. Hydraulic fluid distribution and safety equipments and HP hoses tbrm part of the hydraulic equipment. Approximate cost of fabrication of the equipment is 25' 103 rubles. Sate life of the mounted equipment till major
overhaul is 7000 motor h. Operation of the equipment with the use of erecting crane RDK-250 as the base machine is effective only in case of large volume of works at the same site since considerable labor is involved in moving the equipment from site to site. In this connection, the NOVK-6112 mounted on the type I~O-511B rope-and-pulley excavator is more expedient (Fig.
1).
根据施工单位的经验
改善冲压基坑沉箱基础的设备
Yu. E. Ponomarenko，M. V. Maksimov，UDC 624.152
V. i. Krutov，及 L. V. Erofeev
NOVK-8/14 规范
整机吊车 RDK-250
重量标记，8吨
高度标记，3.5m
冲压机周长直径，m
顶部1.35
底部 0.80
冲压机最大出手高度，14m
最大冲击能量，1100 kJ
冲压机脱模力，250 kN
滑轮比例
从土壤里缩回的冲压机
沿导向立柱上升的冲压机
译自Osnovaniya，Fundamenty i Mekhanika Gruntov，No. 6，pp. 19-21，1991年11－12月
0038-0741/91/2806-0256512.50 . ! 992 Plenum出版社
立柱液压竖直位置调整方法
调整幅度，+ l °30' 度
导向立柱液压上升的方法
导向立柱上升，0.6m
工况位置的所有尺寸，m
高度 19. l
宽度 3.15
长度 9.03
特定油压，kPa 12
NOVK-8/14包含以下部件：导向立柱；保护盖；铰接头,悬架；指引冲压机至基坑轴的机械；后架；环形吊索；有架的撞锤；铆接设备；加油站；立柱上升液压缸。
导向立柱为带有槽沟I型梁制作而成的箱型结构，包含由翼缘连接的底部和顶部。立柱放开撞锤的7、9和14m处有三个铰接架，立柱底部通过滚珠支枢与底座相连，顶部则通过分支块与保护盖相连。
悬架安装在RDK-250起重机臂帽上，导向立柱通过铰链安装在悬架上。
导向机械设计为套筒管，液压缸纵向、横向排列在导向立柱周围。一端与底座活动部分铰接，另一端(终结于叉臂架)，通过滑道与导向立柱连接。立柱上升液压缸安装在叉臂架上，并通过缸杆固定，叉臂架通过环形吊索与铰接头连接。因此，当液压缸杆向外移动，环形吊索被拉起，立柱向上移动至叉臂架和铰接头的滑道。
冲压机由钢板制成，填充混凝土以达到所要求的重量，与支架铰接。阻尼装置安装在支架和冲压机之间，支架与压碎器移动到立柱的滚柱，通过可恢复的中断留在立柱中，一旦磨损则可以被取代。压碎器中心从可能的基坑偏移度不能大于3 cm，轴旋转角度不能大于5 ° 14l。
铆接设备即为支架与冲压机之间的连接，通过整机的绞车向上举起，自动在要求的高度放开，后架选择用钢索改变滑轮比。
液压缸由额外的加油站操控，包括液压箱、泵、以及异步电动机。液压油分配和安全设备以及软管是液压设备的组成部分。制作该设备的预计成本为25' 103卢布。装好的设备到大修的周期为7000摩托小时。使用RDK-250起重机作为整机来运转只有在同一工地的大型操作时才更有效，因为需要很多的人力把设备从一个工地运送到另一个。因此，NOVK-6112安装I~O-511B绳索轮开凿机更为方便(图1).
原件下载： 
| 
