CN212582773U - Sleeve milling joint structure - Google Patents

Sleeve milling joint structure Download PDF

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Publication number
CN212582773U
CN212582773U CN202020861817.9U CN202020861817U CN212582773U CN 212582773 U CN212582773 U CN 212582773U CN 202020861817 U CN202020861817 U CN 202020861817U CN 212582773 U CN212582773 U CN 212582773U
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China
Prior art keywords
joint
groove
phase groove
concrete
phase
Prior art date
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Active
Application number
CN202020861817.9U
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Chinese (zh)
Inventor
兰峰涛
田作华
王天武
李翰卿
陈汉
庞前凤
赵小兵
江龙
邹园林
高利平
李海亮
王峰
刘崇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Railway 22nd Bureau Group Co Ltd
China Railway 22nd Bureau Group Urban Rail Engineering Co., Ltd.
Original Assignee
China Railway 22nd Bureau Group Co Ltd
China Railway 22nd Bureau Group Urban Rail Engineering Co., Ltd.
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Priority to CN202020861817.9U priority Critical patent/CN212582773U/en
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Abstract

The utility model discloses a joint structure is milled to cover, including two first phase groove sections and a second phase groove section, the second phase groove section sets up between two first phase groove sections, and the combination department of second phase groove section and first phase groove section is provided with the joint. The utility model provides a joint structure is milled to cover mills the concrete that both sides first phase groove has hardened through the double round milling, makes fresh and thick 's concrete face form the good concrete cover and mills the joint of water proofness when pouring second phase groove, effectively reduces underground continuous wall joint percolating water phenomenon, greatly reduced the seepage risk of foundation ditch excavation in-process.

Description

Sleeve milling joint structure
Technical Field
The utility model relates to a construction technical field, in particular to cover mills joint design.
Background
In recent years, due to urban traffic improvement, subways are rapidly developed at home and abroad, with the vigorous promotion of the construction of coastal urban rail traffic projects in China, construction and excavation of continuous walls in subways and urban buildings penetrate through different types of stratums from top to bottom, and how to ensure the construction safety, quality and construction speed under unfavorable geological conditions is worth of deeper discussion.
At present, the stability of the wall of the trench in China is researched more, and a certain achievement is achieved, for example, the effect of trenching the soft soil layer of the diaphragm wall is ensured by improving and controlling the control factors influencing the stability of the wall of the trench. At present, the research on the rapid rock stratum grooving construction process at home and abroad has no complete system, and the general underground diaphragm wall grooving mainly comprises an impact drilling method, a drilling and grabbing method, a grabbing method and a milling and selling method. But for special bottom layers, the problems of difficult grooving, construction speed and the like of rock stratums are solved.
And the use of the sleeve milling joint construction process effectively reduces the water leakage phenomenon of the underground diaphragm wall joint and greatly reduces the leakage risk in the excavation process of the foundation pit.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a cover mills joint design is provided, it has reduced the seepage risk among the foundation ditch excavation process.
The utility model discloses the technical problem that solve is realized through following technical scheme:
the utility model provides a joint design is milled to cover, includes two first phase groove sections and a second phase groove section, second phase groove section set up in between two first phase groove sections, second phase groove section with the junction of first phase groove section is provided with the joint.
Preferably, in the above technical scheme, the joint is formed by milling part of concrete at the end of the first-stage groove during the construction of the second-stage groove section and combining the second-stage groove concrete with the first-stage groove concrete after the second-stage groove concrete is poured.
Preferably, in the above technical solution, the width of the joint is 100-300 mm.
Preferably, in the above technical solution, the width of the joint is 150 mm.
Preferably, in the above technical solution, the width of the secondary groove section is 250 mm.
The above technical scheme of the utility model, following beneficial effect has:
the utility model provides a joint structure is milled to cover mills the concrete that both sides first phase groove has hardened through the double round milling, makes fresh and thick 's concrete face form the good concrete cover and mills the joint of water proofness when pouring second phase groove, effectively reduces underground continuous wall joint percolating water phenomenon, greatly reduced the seepage risk of foundation ditch excavation in-process.
Drawings
Fig. 1 is the construction schematic diagram of the sleeve milling joint structure of the utility model.
Fig. 2 is a schematic view of the milling joint of the present invention.
Wherein: 1-first-stage groove section, 2-second-stage groove section, 3-joint and 4-double-wheel milling.
Detailed Description
The following detailed description of the present invention is provided to facilitate further understanding of the invention.
The utility model provides a joint design is milled to cover, includes two first phase groove sections 1 and a second phase groove section 2, and second phase groove section 2 sets up between two first phase groove sections 1, and second phase groove section 2 is provided with joint 3 with the combination department of first phase groove section 1.
Further, when the second-stage groove section 2 is constructed, the joint 3 is formed by milling partial concrete at the end of the first-stage groove by using a double-wheel mill 4 and combining the second-stage groove concrete with the first-stage groove concrete after pouring.
Preferably, the width of the joint is 100-300 mm. More preferably, the width of the tab is 150 mm. The width of the second-stage groove section is 250 mm.
The construction process of the sleeve milling joint structure comprises the steps of performing secondary-stage groove grooving construction between two primary grooves (primary groove sections with poured concrete), milling off part of concrete at the end of the primary groove by adopting a double-wheel mill, and combining the secondary-stage groove concrete with the primary groove concrete after pouring to form a joint; the length of the milling joint of the first-stage slotted hole and the second-stage slotted hole in the axial direction of the ground wall is 150 mm.
The casing milling joint construction process is suitable for a slightly weathered rock stratum with strong weathering and low strength, and rock drilling can be carried out by adopting double-wheel milling; and when the rock strength is high (when the double-wheel milling construction progress is slow), after adopting the percussion drilling or the rotary drilling to drill the guide hole, adopting the double-wheel milling to carry out rock entering drilling.
The sleeve milling joint is suitable for a construction process for grooving the underground diaphragm wall into the slightly weathered rock, the construction progress can be accelerated, the groove milling efficiency is effectively improved, the average groove milling efficiency in the medium weathered granite is 1.5m/h, and the average groove milling efficiency in the slightly weathered granite is 0.5 m/h; meanwhile, the water leakage phenomenon of the underground diaphragm wall joint is effectively reduced, and the leakage risk in the excavation process of the foundation pit is greatly reduced; no hole collapse phenomenon occurs, no tool rest is buried, and the steel bar cage is smoothly arranged in the groove; and the forming efficiency is higher after the second-stage groove turbulent flow concrete is cleaned and guided.
Although the present invention has been described with reference to the above embodiments, it is not intended to limit the present invention, and various alternatives and modifications can be made by those skilled in the art without departing from the spirit and scope of the present invention.

Claims (5)

1. The utility model provides a joint design is milled to cover, its characterized in that includes two first phase groove sections and a second phase groove section, second phase groove section set up in between two first phase groove sections, second phase groove section with the junction of first phase groove section is provided with the joint.
2. The casing milling joint structure of claim 1, wherein the joint is formed by milling part of concrete at the end of the first-stage groove during the construction of the second-stage groove section and combining the second-stage groove concrete with the first-stage groove concrete after pouring.
3. The mill joint structure of claim 1, wherein the width of the joint is 100 mm and 300 mm.
4. A mill joint construction according to claim 3, characterised in that the width of the joint is 150 mm.
5. A mill joint construction according to claim 1, wherein the width of the secondary slot section is 250 mm.
CN202020861817.9U 2020-05-21 2020-05-21 Sleeve milling joint structure Active CN212582773U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020861817.9U CN212582773U (en) 2020-05-21 2020-05-21 Sleeve milling joint structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020861817.9U CN212582773U (en) 2020-05-21 2020-05-21 Sleeve milling joint structure

Publications (1)

Publication Number Publication Date
CN212582773U true CN212582773U (en) 2021-02-23

Family

ID=74641403

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202020861817.9U Active CN212582773U (en) 2020-05-21 2020-05-21 Sleeve milling joint structure

Country Status (1)

Country Link
CN (1) CN212582773U (en)

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