Key Construction Techniques for Emended Cap Unsealed Bottom of Deep‑Water Hard Rock

Authors

ZENG Jian, CCCC Second Harbor Engineering Co ., Ltd., Wuhan , Hubei 430014 , China ;Transportation Industry Key Laboratory of Large-Span Bridge Construction Technology , Wuhan Hubei 430014 , China ;Research and Development Center of Intelligent Manufacturing Technologies of Transport Industry Infrastructure , Wuhan , Hubei 430014 , ChinaFollow
GUAN Xiaohui, CCCC Second Harbor Engineering Co ., Ltd., Wuhan , Hubei 430014 , China ;Transportation Industry Key Laboratory of Large-Span Bridge Construction Technology , Wuhan Hubei 430014 , China
GUO Zhiwei, CCCC Second Harbor Engineering Co ., Ltd., Wuhan , Hubei 430014 , China

Abstract

In the construction of a deep-water embedded cap foundation，it was required to excavate the mud surface to the depth below sealing concrete and clean the bottom carefully，ensuring the height and quality of bottoming concrete.For hard rock under good geological conditions，there exist such problems as difficulty in excavation，long excavation time consumption，and high construction cost.Based on the construction of the main pier caps of the Chongqing Jiahua Metro Bridge，this paper adopted the method of combining theoretical analysis，numerical calculation，and engineering implementation verification，which developed an emended cap unsealed bottom key construction techniques for deep-water hard rock.This construction technology used the method of excavating the wall foundation groove and pouring the foundation groove concrete to replace the large volume of bottom-sealing concrete as a way to achieve the purpose of providing a dry working environment for the construction of the cap.With this method，shorter underwater excavation time，reduced underwater concrete amount，improved construction efficiency，lowered construction time and are achieved.

Publication Date

5-7-2024

DOI

10.14048/j.issn.1671-2579.2024.02.023

First Page

207

Last Page

213

Submission Date

February 2025

Recommended Citation

Jian, ZENG; Xiaohui, GUAN; and Zhiwei, GUO (2024) "Key Construction Techniques for Emended Cap Unsealed Bottom of Deep‑Water Hard Rock," Journal of China & Foreign Highway: Vol. 44: Iss. 2, Article 23.
DOI: 10.14048/j.issn.1671-2579.2024.02.023
Available at: https://zwgl1980.csust.edu.cn/journal/vol44/iss2/23

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