Constant head multihole concrete penetrometer

The utility model discloses a constant head multihole concrete penetrometer. The constant head multihole concrete penetrometer comprises a testing device used for testing permeability coefficients of a multihole concrete sample, a water supply device used for supplying water for the testing device and a drainage device connected with the testing device. The testing device comprises a sample sleeve provided with a sample placement cavity inside, an upper sleeve arranged above the sample sleeve in a sealing mode and a lower sleeve arranged below the sample sleeve in a sealing mode. A spillway hole is formed in the upper portion of the upper sleeve, and a first pressure testing hole is formed in the lower portion of the upper sleeve. The water supply device is arranged above the upper sleeve. A second pressure testing hole is formed in the sample sleeve. The lower sleeve is a water collection groove with the upper portion opened and the bottom sealed, the water collection groove is communicated with the sample placement cavity, and a metal pore plate is arranged on the upper portion of the water collection groove. A drainage hole is arranged in the lower sleeve. The constant head multihole concrete penetrometer is reasonable in structure design, convenient to disassemble and assemble, simple to use and operate, good in sealing performance, accurate in testing data, and capable of effectively solving the problems that an existing constant head tester has leakage on side walls and waterhead testing is inaccurate and the like.