An axis rule scale, pgfplots, tikz, without data

Question

I want to arrange a reference axis of «x» values in a figure, as the third axis below in the photo I attached.

I tried to write the code with a third tikzpicture to resemble an axis scale with values.

\documentclass[12pt,a4paper]{article}

\usepackage{tikz}
\usepackage{pgfplots}

\begin{document}

\begin{figure}[htb]
\centering
\caption{Registro de sismo de Lima y Callao, 1966}
    \begin{tikzpicture}
    \begin{axis}[ylabel={\scriptsize $Sa$ (g)}, xmin=0, xmax=70, legend cell align=left,axis lines=middle,xtick=\empty]
        \addplot [black] table [col sep=space,x index = 1, y index = 2]{
        3270    65.38   -0.000548603
3271    65.4    0.002624689
3272    65.42   0.005662406
3273    65.44   0.004233252
3274    65.46   -0.001235658
3275    65.48   -0.006903344
3276    65.5    -0.006914557
3277    65.52   -0.001607727
3278    65.54   0.002501346
3279    65.56   0.002134373
3280    65.58   -0.001549623
3281    65.6    -0.002156147
3282    65.62   -0.000266239
3283    65.64   0.00042897
        };        
        \addlegendentry{\scriptsize E-O};
        \end{axis}
    \end{tikzpicture}
    \begin{tikzpicture}
        \begin{axis}[xlabel={\scriptsize $T$ (s)}, 
        ylabel={
        \scriptsize $Sa$ (g)}, 
        xmin=0,
        xmax=70, 
        legend cell align=left,
        axis lines=middle,
        xtick=\empty]
        \addplot [black] table [col sep=space,x index = 1, y index = 2]{
        3243    64.84   -0.00198999
3244    64.86   -0.003625056
3245    64.88   -0.001574088
3246    64.9    -0.002725974
3247    64.92   -0.008682141
3248    64.94   -0.014073578
3249    64.96   -0.010333517
3250    64.98   -0.005930866
3251    65  -0.00811843
3252    65.02   -0.006286626
3253    65.04   0.001910112
3254    65.06   0.006209806
3255    65.08   0.002593089
3256    65.1    0.000753129
3257    65.12   0.005030398
3258    65.14   0.008223058
3259    65.16   0.005382079
3260    65.18   0.00023631
3261    65.2    -0.002535352
3262    65.22   -0.002578165
3263    65.24   -0.002353904
3264    65.26   -0.003784077
3265    65.28   -0.004187747
3266    65.3    -0.001268277
3267    65.32   0.001210826
3268    65.34   0.000134373
3269    65.36   -0.001777961
        };        
        \addlegendentry{\scriptsize N-S};
        \end{axis}
    \end{tikzpicture}
    \begin{tikzpicture}
        \begin{axis}[xlabel={\scriptsize $T$ (s)},
        restrict y to domain=0:0, 
        xmin=0,
        xmax=70, 
        xtick=\empty]
        \end{axis}
    \end{tikzpicture}
\end{figure}

    \end{document}

Answer 1

or you are investigating something about my country?, whatever, here another option without groupplots; you can draw various axis in one tikzpicture environment using at={(Coordinate_position)}. Some options were added to find the resul like the photo example, the data is within the code using filecontents package,and is needed if you use it for future questions to give a real MWE and to not copy and paste the data many times in the code.

RESULT:

MWE:

\documentclass[crop]{standalone}
\usepackage{pgfplots}
\usepackage{filecontents}
\pgfplotsset{compat=1.14}

\begin{document}
\begin{filecontents}{data01.dat}
0   0           0       0
1   0.01        3       2.5
2   0.02        -5      -5
3   -0.1        -4      -5.5
4   0.25        -13.04  -3
5   -0.319      -0      -4
6   0.3         -7      -8.40
7   0.2         8       -3
8   -0.1        2       -6
9   0.09        9       2
10  -0.05       2       2.1
11  0.02        -8      2.5
12  -0.01       -0      -4
13  0.01        -8      -3
14  -0.01       14      -7
15  0.2         13      -4
16  0           0       0
17  0.01        1       2.5
18  0.02        -2      -5
19  -0.01       -1      -5.5
20  0           0       -0.5
21  0.01        1       -1.5
22  0.02        -2      -5
23  -0.02       -1      -5.5
24  0           0       -2
25  0.01        2       -1
26  0.02        -1      -2.5
27  -0.03       -0      -3
\end{filecontents}

\begin{tikzpicture}
    \begin{axis}[
        width=10cm,
        height=4cm,
        at={(0,0)},
        ymin=-0.4,
        ymax=0.4,
        xmin=0,
        xmax=30,
        ylabel=${\ddot{u}_g,g}$,
        tick align=outside,
        axis x line*=middle,
        axis y line*=none,
        xtick=\empty,
        ytick={0,-0.4,0.4},
        y tick label style={
            /pgf/number format/assume math mode, font=\scriptsize},
    ]
    \addplot[black,smooth,tension=0.1,thick] table [x index=0,y index=1,col sep=space] {data01.dat};
    \addplot[] coordinates{(5,-0.319)} node[circle,draw,thick,inner sep=0,minimum size=3pt](N1){};
    \end{axis}
    \draw (N1.center)+(-90:2pt) node[anchor=west]{\scriptsize ${\ddot{u}_{go}=0.319g}$};

    \begin{axis}[
            width=10cm,
        height=4cm,
        at={(0,-3cm)},
        ymin=-15,
        ymax=15,
        xmin=0,
        xmax=30,
        ylabel=${\dot{u}_g,in./sec}$,
        tick align=outside,
        axis x line*=middle,
        axis y line*=none,
        xtick=\empty,
        ytick={0,-15,15},
        y tick label style={
            /pgf/number format/assume math mode, font=\scriptsize},
    ]
    \addplot[black,smooth,tension=0.4,thick] table [x index=0,y index=2,col sep=space] {data01.dat};
    \addplot[] coordinates{(4,-13.4)} node[circle,draw,thick,inner sep=0,minimum size=3pt](N2){};
    \end{axis}
    \draw (N2.center)+(-90:2pt) node[anchor=west]{\scriptsize ${\dot{u}_{go}=13.04in./sec}$};

    \begin{axis}[
            width=10cm,
        height=4cm,
        at={(0,-6cm)},
        ymin=-10,
        ymax=3,
        xmin=0,
        xmax=30,
        ylabel=${u_g,in.}$,
        tick align=outside,
        axis x line*=middle,
        axis y line*=none,
        xtick=\empty,
        ytick={0,-10,3},
        y tick label style={
            /pgf/number format/assume math mode, font=\scriptsize},
    ]
    \addplot[black,smooth,tension=0.7,thick] table [x index=0,y index=3,col sep=space] {data01.dat};
    \addplot[] coordinates{(6,-8.4)} node[circle,draw,thick,inner sep=0,minimum size=3pt](N3){};
    \end{axis}
    \draw (N3.center)+(-90:2pt) node[anchor=west]{\scriptsize ${u_{go}=8.4in.}$};

    \begin{axis}[
        width=10cm,
        height=4cm,
        at={(0,-6.1cm)},
        axis y line=none,
        axis x line*=none,
        tick align=outside,
        xmin=0,
        xmax=30,
        ymin=-1,
        ymax=1,
        minor tick num=1,
        xlabel={Time, sec},
        x tick label style={
            /pgf/number format/assume math mode, font=\scriptsize}
    ]
    \end{axis}
\end{tikzpicture}
\end{document} 

Answer 2

I do not understand your question so I have only some remarks to offer. I personally would use groupplots rather than stacking different tikzpictures. You can cheat and draw a plot with opcaity=0 if you only want some axis lines.

\documentclass[12pt,a4paper]{article}    
\usepackage{tikz}
\usepackage{pgfplots}
\usepgfplotslibrary{groupplots}
\pgfplotsset{compat=1.16}
\begin{document}

\begin{figure}[htb]
\centering
\caption{Registro de sismo de Lima y Callao, 1966}
    \begin{tikzpicture}
    \begin{groupplot}[group style={group size=1 by 3}]
    \nextgroupplot[ylabel={\scriptsize $Sa$ (g)}, xmin=0, xmax=70, legend cell
    align=left,axis lines=middle,xtick=\empty,width=12cm]
        \addplot [black] table [col sep=space,x index = 1, y index = 2]{
        3270    65.38   -0.000548603
3271    65.4    0.002624689
3272    65.42   0.005662406
3273    65.44   0.004233252
3274    65.46   -0.001235658
3275    65.48   -0.006903344
3276    65.5    -0.006914557
3277    65.52   -0.001607727
3278    65.54   0.002501346
3279    65.56   0.002134373
3280    65.58   -0.001549623
3281    65.6    -0.002156147
3282    65.62   -0.000266239
3283    65.64   0.00042897
        };        
        \addlegendentry{\scriptsize E-O};
    \nextgroupplot[xlabel={\scriptsize $T$ (s)}, 
        ylabel={
        \scriptsize $Sa$ (g)}, 
        xmin=0,
        xmax=70, 
        legend cell align=left,
        axis lines=middle,
        xtick=\empty,width=12cm]
        \addplot [black] table [col sep=space,x index = 1, y index = 2]{
        3243    64.84   -0.00198999
3244    64.86   -0.003625056
3245    64.88   -0.001574088
3246    64.9    -0.002725974
3247    64.92   -0.008682141
3248    64.94   -0.014073578
3249    64.96   -0.010333517
3250    64.98   -0.005930866
3251    65  -0.00811843
3252    65.02   -0.006286626
3253    65.04   0.001910112
3254    65.06   0.006209806
3255    65.08   0.002593089
3256    65.1    0.000753129
3257    65.12   0.005030398
3258    65.14   0.008223058
3259    65.16   0.005382079
3260    65.18   0.00023631
3261    65.2    -0.002535352
3262    65.22   -0.002578165
3263    65.24   -0.002353904
3264    65.26   -0.003784077
3265    65.28   -0.004187747
3266    65.3    -0.001268277
3267    65.32   0.001210826
3268    65.34   0.000134373
3269    65.36   -0.001777961
        };        
        \addlegendentry{\scriptsize N-S};
      \nextgroupplot[xlabel={\scriptsize $T$ (s)},
      height=2cm,width=12cm,ytick=\empty,
        ymin=0,ymax=1,axis lines=middle]
        \addplot [opacity=0] table [col sep=space,x index = 1, y index = 2]{
        3243    64.84   -0.00198999
3244    64.86   -0.003625056
3245    64.88   -0.001574088
3246    64.9    -0.002725974
3247    64.92   -0.008682141
3248    64.94   -0.014073578
3249    64.96   -0.010333517
3250    64.98   -0.005930866
3251    65  -0.00811843
3252    65.02   -0.006286626
3253    65.04   0.001910112
3254    65.06   0.006209806
3255    65.08   0.002593089
3256    65.1    0.000753129
3257    65.12   0.005030398
3258    65.14   0.008223058
3259    65.16   0.005382079
3260    65.18   0.00023631
3261    65.2    -0.002535352
3262    65.22   -0.002578165
3263    65.24   -0.002353904
3264    65.26   -0.003784077
3265    65.28   -0.004187747
3266    65.3    -0.001268277
3267    65.32   0.001210826
3268    65.34   0.000134373
3269    65.36   -0.001777961
        };        
        \end{groupplot}
    \end{tikzpicture}
\end{figure}
\end{document}