环形图数据被遮挡怎么办echarts 饼配置项内容和展示

由于页面多图；且每一项显示的数据较多；在标签页中；每个图表容器的大小有限制；高度为230px;这时数据就会被遮挡而不能显示；怎么解决呢

      option = {
    noDataLoadingOption: {
        text: '暂无数据',
        effect: 'bubble',
        effectOption: {
            effect: {
                n: 0
            }
        }
    },
    title: {
        text: ' 一二三',
        y: "center",
        x: "center"
    },
    //color:colors,
    tooltip: {
        trigger: 'item',
        position: function(a) {
            a[0] += 50;
            a[1] += 50;
            return a
        },
        formatter: "{a} <br/>{b}: {c} ({d}%)"
    },
    /*animation:false,*/
    series: [{
        label: {
            normal: {
                position: 'inside'
            }
        },
        
        name: "一二三",
        type: 'pie',
        radius: ['48%', '70%'],
        minAngle: 10,
        startAngle: 75,
        selectedMode: 'single',
        avoidLabelOverlap: true, //是否启用防止标签重叠策略，默认开启

        itemStyle: { //两种方式都对这是echarts2x中的
            normal: {

                label: {

                    formatter: function(params) {
                        var obj = params.data;
                        var str = obj.name + ',(' + obj.percent + '%)' + ',' + obj.value;
                        return str.split(",").join("\n");
                    },
                    textStyle: {
                        fontSize: 13,
                        color: '#333'
                    }
                }

            }
        },

        data: [{
            "name": "房建",
            "value": 10000096297.64,
            "percent": 100,
            "itemStyle": {
                "normal": {
                    "color": "#3185c1"
                }
            }
        }, {
            "name": "土石方",
            "value": 63250,
            "percent": 0,
            "itemStyle": {
                "normal": {
                    "color": "#39cccc"
                }
            }
        }, {
            "name": "市政",
            "value": 30000,
            "percent": 0,
            "itemStyle": {
                "normal": {
                    "color": "#eec132"
                }
            }
        }]

    }]
};