CN211256877U

CN211256877U - Hydraulic engineering cut-off wall

Info

Publication number: CN211256877U
Application number: CN201921425840.7U
Authority: CN
Inventors: 陈志阔; 徐磊; 孙云飞; 陈家昊; 周宗博; 侯金辰
Original assignee: Shanghai Construction No 1 Group Co Ltd
Current assignee: Shanghai Construction No 1 Group Co Ltd
Priority date: 2019-08-29
Filing date: 2019-08-29
Publication date: 2020-08-14
Anticipated expiration: 2029-08-29

Abstract

The utility model discloses a hydraulic engineering cut-off wall, follow supreme first wall body including being arranged in the basement layer in proper order down, be arranged in the second wall body in the clay layer to and be arranged in the third wall body in the sand cobble layer. The utility model discloses a hydraulic engineering cut-off wall forms the reinforced concrete wall body that forms in the complicated geological environment who contains drift sand egg gravel layer or the muddy matter of the long-pending drift sand egg gravel layer that dashes that contains big boulder, has improved the construction quality and the engineering intensity of cut-off wall, can play the reinforced (rfd) effect of prevention of seepage to hydraulic engineering before flood season comes.

Description

Hydraulic engineering cut-off wall

Technical Field

The utility model relates to a hydraulic engineering field, in particular to hydraulic engineering cut-off wall.

Background

In water conservancy projects, seepage-proofing reinforcement is a main engineering measure for treating dangerous reservoir dams, and commonly used seepage-proofing reinforcement technologies in the projects mainly comprise grouting seepage-proofing reinforcement technology and seepage-proofing wall reinforcement technology. Before the construction of the impervious wall, a guide wall is constructed on the ground according to requirements, a hydraulic grab bucket is adopted for grooving, a slurry retaining wall is adopted for ensuring the stability of a groove body, and concrete is poured to form the impervious wall. The anti-seepage wall has the advantages of reliable structure, good anti-seepage effect, suitability for various stratum conditions, simple construction, low cost and the like. However, in a complex geological environment, for example, the geology is mostly a floating sand and egg gravel layer accumulated by flood or a muddy floating sand and egg gravel layer, and the construction conditions such as large boulders are mostly contained, and the like, the construction of the impervious wall has more quality problems. The construction of grooving can be continued after the large boulder is broken and excavated, the construction consumes time and labor, the construction efficiency is reduced, the construction period is influenced, required time nodes cannot be completed before the flood season, the safety flood season becomes luxury, and the project planning period cannot be guaranteed. Therefore, the diaphragm wall suitable for complex geological environment and the construction process thereof are urgently needed in the field, the goals of wide application, economy, high efficiency and simple and convenient construction are achieved, and the diaphragm wall is an important construction technical problem for diaphragm wall application in water conservancy projects.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that, overcome more than not enough, provide a hydraulic engineering cut-off wall to be applicable to the complicated geological environment that contains drift sand ovum gravel layer or the muddy matter of the long-pending accumulational drift sand ovum gravel layer that dashes that contains big boulder, can play the reinforced effect of prevention of seepage to hydraulic engineering before flood season comes.

In order to solve the technical problem, the utility model provides a hydraulic engineering cut-off wall, follow supreme first wall body that is arranged in the basement layer of being included in proper order down, be arranged in the second wall body in the clay layer to and be arranged in the third wall body in the sandy gravel layer.

Further, the utility model provides a hydraulic engineering cut-off wall, the sand cobble layer floats sand ovum gravel layer or muddy matter for containing big boulder and floats sand ovum gravel layer, the clay layer is for containing gravel powder matter clay layer.

Further, the utility model provides a hydraulic engineering cut-off wall, the reinforced concrete wall body of first wall body, second wall body and third wall body structure as an organic whole.

Compared with the prior art, the utility model provides a hydraulic engineering cut-off wall forms the reinforced concrete wall body that forms in the complicated geological environment who contains drift sand egg gravel layer or the muddy sand egg gravel layer of the long-pending drift sand egg gravel layer of dashing of containing big boulder, has improved the construction quality and the engineering intensity of cut-off wall, can play the reinforced (rfd) effect of prevention of seepage to hydraulic engineering before flood season comes.

Drawings

Fig. 1 is a schematic structural diagram of a plurality of groove sections of hydraulic engineering cut-off wall of utility model embodiment.

Fig. 2 to 6 are schematic views of the construction process of the hydraulic engineering diaphragm wall according to the embodiment of the present invention;

fig. 7 is the utility model discloses hydraulic engineering cut-off wall's schematic structure.

Shown in the figure: 10. the device comprises a hoisting device, 20, a percussion drill, 30, a grab bucket, 40, a reinforcement cage, 50, a conduit, 60, a pumping device, 70, a joint pipe, 110, a sand-gravel layer, 111, a guide groove, 112, a ground plane, 120, a clay layer, 130, a foundation layer, 200, a groove body, 300, an impervious wall, 301, a first wall body, 302, a second wall body, 303, a third wall body, 401, a main hole, 402, an auxiliary hole, 501, a first phase groove section, 502 and a second phase groove section.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings:

the embodiment of the utility model provides a construction method of hydraulic engineering cut-off wall is applied to the complicated geological environment who floats sand ovum gravel layer or muddy drift sand ovum gravel layer that contains big boulder. The utility model discloses complicated geological environment includes the clay layer 120 on the sand cobble layer 110, the second floor of first layer and the basement rock stratum 130 of third layer from top to bottom in proper order.

Referring to fig. 1 to 7, an embodiment of the present invention provides a construction method of a hydraulic engineering diaphragm wall, including the following steps:

referring to fig. 1, a construction area is divided into a plurality of groove segments, and a main hole 401 and an auxiliary hole 402 are preset in each groove segment and are distributed at intervals. For example: each slot segment is provided with 4 main holes 401 and 3 secondary holes 402. In the first step, the plurality of groove sections are divided into first phase groove sections 501 located on two sides and second phase groove sections 502 located between the first phase groove sections 501 located on two sides, and after the groove bodies are constructed on the first phase groove sections 501 located on two sides, the groove bodies are constructed on the second phase groove sections 502. Firstly, the construction of the first stage groove section 501 is carried out, after the main hole 401 is drilled to the designed depth in the construction process, the auxiliary hole 402 is drilled, and finally the groove body is formed by splitting into the small wall. According to the construction mode of the slotted sections, the first slot sections 501 on the two sides of the second slot section 502 are constructed, so that free spaces are formed on the two sides of the second slot section 502, and the construction difficulty of the second slot section 502 can be reduced.

Step two, referring to fig. 2, constructing a guide groove 111 downwards along the ground plane 112 of the sand and gravel layer 110 in the same groove section; the depth of the guide groove 111 includes, but is not limited to, 1.5 meters to 2 meters.

Referring to fig. 2, a first layer of the main hole 401 is drilled in the sand-gravel layer 110 by using the percussion drill 20 until the main hole 401 reaches the clay layer 120. In the third step, the percussion drill 20 suspends the percussion drill 20 by using a hoisting device 10 such as a crane to drill the sand and gravel layer 110.

Step four, referring to fig. 3, a second layer of construction of the main hole 401 is performed on the clay layer 120 by grabbing with the grab bucket 30 until the main hole 401 reaches the foundation layer 130;

step five, referring to fig. 4, drilling a hole in the foundation layer 130 by using the percussion drill 20 to construct a third layer of the main hole 401 until the main hole 401 reaches the design depth;

step six, referring to fig. 5, after the main holes 401 in the same groove section reach the designed depth, cleaning and replacing the holes, and constructing other main holes 401 in the same groove section until all the main holes 401 in the same groove section are completely constructed;

step seven, referring to fig. 5, after all the main holes 401 are constructed to the designed depth, the construction of the auxiliary holes 402 is carried out, so that the main holes 401 and the auxiliary holes 402 are communicated with each other to form the tank body 200;

step eight, referring to fig. 6 and 7, a steel reinforcement cage 40 is lowered into the tank 200, and concrete is poured through the conduit 50 to form the cut-off wall 300 of the reinforced concrete structure. Commercial concrete can be poured into the reinforcement cage 40 and the trough body 200 through the conduit 50 by using pumping equipment 50 such as a pumping truck.

Referring to fig. 6, in the construction method of the hydraulic engineering cut-off wall 300 according to the embodiment of the present invention, before the reinforcement cage 40 is lowered into the tank 200, joint holes are constructed on both sides of the same section between the adjacent guide grooves 111, and the slurry on the wall of the joint hole is cleaned and changed, and then the joint pipe 70 is installed. Wherein the coupler tube 70 is a member for coupling other reinforcement cages. The nipple 70 is disposed within the nipple bore.

Referring to fig. 7, in the construction method of the hydraulic engineering cut-off wall 300 according to the embodiment of the present invention, the cut-off wall 300 sequentially includes, from bottom to top, a first wall 301 located in the foundation layer 130, a second wall 302 located in the clay layer 120, and a third wall 303 located in the sand-gravel layer 110. The first wall 301, the second wall 302 and the third wall 303 are reinforced concrete walls of an integrated structure.

The embodiment of the utility model provides a hydraulic engineering cut-off wall 300, sand cobble layer 110 is for containing the boulder layer or the mud boulder layer that floats of big boulder, clay layer 120 is for containing gravel powder matter clay layer 120.

The embodiment of the utility model provides a hydraulic engineering cut-off wall 300, the reinforced concrete wall body of first wall body 301, second wall body 302 and third wall body 303 structure as an organic whole.

The embodiment of the utility model provides a hydraulic engineering cut-off wall 300 and construction method thereof, realized containing the big boulder drift long-pending drift sand egg gravel layer or the muddy complicated geological environment under the cut-off wall 300 engineering construction that contains drift sand egg gravel layer of drift sand that dashes, adopt percussion drill 20 and grab bucket 30 cooperation to accomplish the cell body 200 construction of the whole trough section of cut-off wall 300, the time of winning for the flood safety of river sluice construction period, different geological stratification adopts different cell body 200 technologies, then construction reinforced concrete structure's cut-off wall 300, construction efficiency is improved, can accomplish the construction of cut-off wall 300 before the flood season comes, can furthest save the engineering time, for the time of winning the flood safety of river sluice construction period, the difficult problem that wall cut-off wall 300 construction quality problem is difficult to guarantee under the complicated geological environment has been solved, good social and economic benefits have. The embodiment of the utility model provides a hydraulic engineering cut-off wall 300 forms the reinforced concrete wall body that forms in foretell complicated geological environment, has improved the construction quality and the engineering intensity of cut-off wall 300, and structural reliability is high, the prevention of seepage is effectual, can play the reinforced (rfd) effect of prevention of seepage to hydraulic engineering before the flood season comes.

The present invention is not limited to the above embodiments, and any modifications and modifications made by those skilled in the art according to the above embodiments are within the scope of the claims.

Claims

1. The utility model provides a hydraulic engineering cut-off wall which characterized in that, from supreme first wall body that includes in proper order down in the basement rock stratum, the second wall body that is arranged in the clay layer to and the third wall body that is arranged in the sand cobble layer.

2. The hydraulic engineering cut-off wall of claim 1, wherein the sandy gravel layer is a boulder pebble layer containing large boulders or a muddy boulder pebble layer, and the clay layer is a clay layer containing gravel.

3. The hydraulic engineering diaphragm wall of claim 1, wherein the first wall, the second wall and the third wall are reinforced concrete walls of an integrated structure.