CN206736883U - 现场地基动态压缩模量测试仪 - Google Patents

现场地基动态压缩模量测试仪 Download PDF

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CN206736883U
CN206736883U CN201720379797.XU CN201720379797U CN206736883U CN 206736883 U CN206736883 U CN 206736883U CN 201720379797 U CN201720379797 U CN 201720379797U CN 206736883 U CN206736883 U CN 206736883U
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compression modulus
force
center rest
dynamic compression
loading
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张建经
孙延军
毕理毅
周羽哲
邓小宁
曹礼聪
何梦
张阔
曾鹏毅
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China Nuclear Engineering & Construction Corp ltd
China Nuclear Power Survey Design And Research Co ltd
Southwest Jiaotong University
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ZHENGZHOU CHINA NUCLEAR GEOTECHNICAL ENGINEERING Co Ltd
Southwest Jiaotong University
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Abstract

本实用新型公开了一种现场地基动态压缩模量测试仪,包括立于地基表面的激光位移计(200)、立于地基上的实验加载机构,以及数据处理箱(100),所述实验加载机构的稳定支架(4)上设置有竖向滑轨(20)。反力模块(5)、直线激振器(6)、小面积的加载锤(8)固联为一体,并通过滑轮组(3)可滑动地联接在稳定支架(4)上;所述滑轮组(3)与稳定支架上的滑轨契合;所述直线激振器(6)为两台同步电机,电机输出轴设置有偏心块组(9);所述加载锤(8)上置有获取加载冲击力的力传感器(7)。本实用新型所提供的装置,结构可靠,操作简便,各模块可拆卸组装,极大的方便了广大一线勘察测试人员。

Description

现场地基动态压缩模量测试仪
技术领域
本实用新型涉及土工实验沈北,尤其是一种用于测试现场地基动态压缩模量的岩土工程原位勘察设备。
背景技术
近年来,世界各地大地震日益频繁,甚至会引发海啸、滑坡、崩塌、地裂缝等次生灾害。在我国,历史上也发生过很多破坏性很大的地震,以08年的四川大地震为甚,由此可见,地震灾害对人们生命财产安全造成了极大的威胁。
建筑物受到地震的作用时,对地基产生动态荷载。地基在动态荷载下产生进一步的压缩沉降,造成建筑物的倾斜、开裂,对建筑物造成损害。本设备通过对地基施加动态荷载,测量地基在动态荷载下产生的压缩沉降,从而测量出地基的动态压缩模量。现行规范中已经编写了与地层压缩模量相关试验与计算方法,但还未涉及动态地基压缩模量方面内容。本设备填补了现行规范在动态地基压缩模量试验与计算方面的空白,为工程中对动态压缩模量的进一步应用提供了参考。
实用新型内容
本实用新型的目的是提供一种测量地基动态压缩模量的测试设备,对地基动态压缩模量进行测试。
本实用新型所采用的技术方案是:
一种现场地基动态压缩模量测试仪,包括立于地基表面的激光位移计200、立于地基上的实验加载机构,以及采集处理激光位移计所获地基位移信息和实验加载机构加载信息的数据处理箱100,所述实验加载机构的构成为:稳定支架4上设置有竖向滑轨20;反力模块5、直线激振器6、小面积的加载锤8固联为一体,并通过滑轮组3可滑动地联接在稳定支架4上,所述滑轮组3与稳定支架上的滑轨契合;所述直线激振器6为两台同步电机,电机输出轴设置有偏心块组9;所述加载锤8上置有获取加载冲击力的力传感7。
进一步地,所述稳定支架4通过钢钉固定于地面;加载锤8为直径为30cm 的圆形;反力模块5质量按照激振力大小调节;直线激振器的偏心块组9调节相对角度以调节激振力。
直线激振器6在通电后使两台电机同步启动,电机带动两组偏心质量块相向旋转,产生垂向正弦波激振力,对地基施加动态荷载;偏心质量块夹角可调,用于控制激振力输出。通过稳定支架4与滑轨限制直线激振器6与反力模块5 的水平向运动,使直线激振器6与反力模块5只能在垂直方向产生位移。上部反力模块5按照加载等级增加质量块,提供大于激振力峰值的反力。
这样,在工作时,加载锤8在直线激振器6与反力模块5的共同作用下,向被测场地传递动态压力;安装于加载锤8上的力传感器7记录压力情况,安装于加载支架旁的激光位移计2记录加载锤沉降位移,从而得到用于计算地基动态压缩模量数据。
附图说明如下:
图1为本实用新型一种动态压缩模量测试设备整体示意图。
图2为本实用新型直线激振器三维示意图。
图3为本实用新型滑轮与滑轨三维示意图。
具体实施方式
下面结合附图和实施例对本实用新型作进一步说明,本实用新型的实施方式包括但不限于下列实施例。
由图1可以看到,稳定支架4通过钢钉固定在被测场地。直线振动源、加载锤8、反力模块5三部分,通过滑轮以及滑轨与稳定支架4衔接。通过稳定支架 4与滑轨限制直线激振器6与反力模块5的水平向运动,使其只能在垂直方向运动;系统通过直线激振器6提供垂直方向激振力,由加载锤8作用于被测土体,通过力传感器7与激光位移计200采集力与位移关系曲线,最终由数据处理箱 100得到地基动态压缩模量。
图2为直线激振器6示意图,在系统静止时,直线激振器两个电机上的两组偏心质量块重心位于同一水平线,控制两者初相位相同。
具体测试时,场地需具有一定强度,是适合作为结构物地基的场地;细粒土 (粉土、砂土)需在压实条件下方可进行检测。测试场地需是平整无坑洞的地面。对于粗粒土混合料造成的表面凹凸不平,应该铺设一层约2~3mm的干燥中砂或者石膏腻子。
具体测试时,将稳定支架4安装于测试场地,并调整至水平,通过钢钉固定支架于测试场地;安装反力模块5、直线振动器、加载锤8组成的整体于稳定支架4内部,使两者通过滑轮滑轨契合;根据加载级别,调整反力模块5质量;接通电源,调零传感器,确认无误后进行加载测试。
本实用新型所提供的装置,结构可靠,操作简便,各模块可拆卸组装,极大的方便了广大一线勘察测试人员。

Claims (5)

1.一种现场地基动态压缩模量测试仪,包括立于地基表面的激光位移计(200)、立于地基上的实验加载机构,以及采集处理激光位移计(200)所获地基位移信息和实验加载机构加载信息的数据处理箱(100),其特征在于,所述实验加载机构的构成为:稳定支架(4)上设置有竖向滑轨(20);反力模块(5)、直线激振器(6)、小面积的加载锤(8)固联为一体,并通过滑轮组(3)可滑动地联接在稳定支架(4)上,所述滑轮组(3)与稳定支架上的滑轨契合;所述直线激振器(6)为两台同步电机,电机输出轴设置有偏心块组(9);所述加载锤(8)上置有获取加载冲击力的力传感器(7)。
2.根据权利要求1所述的现场地基动态压缩模量测试仪,其特征在于,所述稳定支架(4)通过钢钉固定于地面。
3.根据权利要求1所述的现场地基动态压缩模量测试仪,其特征在于,加载锤(8)为直径为30cm的圆形。
4.根据权利要求1所述的现场地基动态压缩模量测试仪,其特征在于,反力模块(5)质量按照激振力大小调节。
5.根据权利要求1所述的现场地基动态压缩模量测试仪,其特征在于,直线激振器的偏心块组(9)调节相对角度以调节激振力。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107059833A (zh) * 2017-04-12 2017-08-18 西南交通大学 现场地基动态压缩模量测试仪

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107059833A (zh) * 2017-04-12 2017-08-18 西南交通大学 现场地基动态压缩模量测试仪

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