Code:
\documentclass[12pt,a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage[ngerman]{babel}
\usepackage{amsmath}
\usepackage{tikz,pgfplots}
\begin{document}
\begin{figure}[htbp]
\centering
\begin{tikzpicture}[scale=0.4]
% Links
\draw [very thick] (-1,-0.09)--(-1.87,9.87)--(-0.87,9.96)--(0,0)--(-1,-0.09);
\draw [very thick] (-0.5,-0.04)--(-1.37,9.92);
\draw [very thick] (1.5,0)--(2.5,-0.09)--(3.37,9.87)--(2.37,9.96)--(1.5,0);
\draw [very thick] (2,-0.04)--(2.87,9.92);
\draw [very thick] (-1.04,0.41)--(-0.04,0.5);
\draw [very thick] (-1.08,0.91)--(-0.09,1);
\draw [very thick] (-1.13,1.41)--(-0.13,1.49);
\draw [very thick] (-1.17,1.91)--(-0.17,1.99);
\draw [very thick] (-1.21,2.4)--(-0.22,2.49);
\draw [very thick] (-1.26,2.9)--(-0.26,2.99);
\draw [very thick] (-1.3,3.4)--(-0.31,3.49);
\draw [very thick] (-1.34,3.9)--(-0.35,3.98);
\draw [very thick] (-1.39,4.4)--(-0.39,4.48);
\draw [very thick] (-1.43,4.89)--(-0.44,4.98);
\draw [very thick] (-1.48,5.39)--(-0.48,5.48);
\draw [very thick] (-1.52,5.89)--(-0.52,5.98);
\draw [very thick] (-1.56,6.39)--(-0.57,6.48);
\draw [very thick] (-1.61,6.89)--(-0.61,6.97);
\draw [very thick] (-1.65,7.38)--(-0.65,7.47);
\draw [very thick] (-1.69,7.88)--(-0.7,7.97);
\draw [very thick] (-1.74,8.38)--(-0.74,8.47);
\draw [very thick] (-1.78,8.88)--(-0.78,8.97);
\draw [very thick] (-1.82,9.38)--(-0.83,9.46);
% Rechts
\draw [very thick] (1.54,0.5)--(2.54,0.41);
\draw [very thick] (1.69,1)--(2.58,0.91);
\draw [very thick] (1.63,1.49)--(2.63,1.41);
\draw [very thick] (1.67,1.99)--(2.67,1.91);
\draw [very thick] (1.72,2.49)--(2.71,2.4);
\draw [very thick] (1.76,2.99)--(2.76,2.9);
\draw [very thick] (1.81,3.49)--(2.8,3.4);
\draw [very thick] (1.85,3.98)--(2.84,3.9);
\draw [very thick] (1.89,4.48)--(2.89,4.4);
\draw [very thick] (1.94,4.98)--(2.93,4.89);
\draw [very thick] (1.98,5.48)--(2.98,5.39);
\draw [very thick] (2.02,5.98)--(3.02,5.89);
\draw [very thick] (2.07,6.48)--(3.06,6.39);
\draw [very thick] (2.11,6.97)--(3.11,6.89);
\draw [very thick] (2.15,7.47)--(3.15,7.38);
\draw [very thick] (2.2,7.97)--(3.19,7.88);
\draw [very thick] (2.24,8.47)--(3.24,8.38);
\draw [very thick] (2.28,8.97)--(3.28,8.88);
\draw [very thick] (2.33,9.46)--(3.32,9.38);
% Mitte
\draw [very thick] (1.04,0.01)--(1.04,0.51)--(1.14,1.01)--(1.18,1.51)--(1.29,4.5)--(1.39,5)--(1.52,5.5)--(1.66,8.49)--(1.75,8.99)--(1.86,9.99);
\draw [very thick] (0.75,1.01)--(0.75,1.51)--(0.75,4.51)--(0.68,5.01)--(0.52,5.51)--(0.47,8.01)--(0.4,8.5)--(0.32,9)--(0.25,10);
\draw [very thick] (1.02,5.01)--(1.02,5.51)--(1.05,8.01)--(1.15,8.5)--(1.25,9)--(1.33,10);
\draw [very thick] (0.75,8.51)--(0.75,10.01);
\draw [very thick] (0.46,0.01)--(0.46,0.51)--(0.36,1.01)--(0.32,1.51)--(0.21,4.5)--(0.18,5)--(0.02,5.5)--(-0.14,8.49)--(-0.18,8.99)--(-0.27,9.99);
% Versetzungen
\draw [very thick] (0.6,0.7)--(0.9,0.7);
\draw [very thick] (0.75,0.7)--(0.75,0.9);
\draw [very thick] (0.87,4.7)--(1.17,4.7);
\draw [very thick] (1.02,4.7)--(1.02,4.9);
\draw [very thick] (0.6,8.2)--(0.9,8.2);
\draw [very thick] (0.75,8.2)--(0.75,8.4);
% Kreis
\draw (0.75,-19.99) circle(20cm);
\end{tikzpicture}
\end{figure}
\end{document}
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