  We study the interactions of the $\Sigma_c\Sigma_c$ system in the framework
of chiral effective theory. We consider the contact, one-pion and two-pion
exchange interactions and bridge the low energy constants of the
$\Sigma_c\Sigma_c$ system to those of the $\Sigma_c^{(*)}\bar{D}^{(*)}$ systems
through the quark-level ansatz for the contact interaction. We explore the
influence of intermediate channels in the two-pion exchange diagrams of the
$\Sigma_c\Sigma_c$ system. We obtain a deep bound state
$[\Sigma_c\Sigma_c]_{J=0}^{I=0}$ and a shallow bound state
$[\Sigma_c\Sigma_c]_{J=1}^{I=1}$. As a byproduct, we further investigate the
interactions of the $\Lambda_c\Lambda_c$ and $\Lambda_c\Sigma_c$ systems.
