Modular diaphragm wall joint structure

Abstract

The utility model discloses a modularized anti-seepage wall joint structure which comprises groove wall reinforcement, guide wall construction, transverse short wall construction, first-stage anti-seepage wall construction and second-stage anti-seepage wall construction. Before first-stage and second-stage diaphragm wall construction is carried out, transverse short walls are firstly constructed; during first-stage diaphragm wall construction, longitudinal wall concrete is cut; during construction of the second-stage diaphragm wall, transverse short wall concrete and first-stage diaphragm wall concrete are cut, and finally the C-shaped connector is formed. The transverse short wall is pre-constructed, seepage paths are remarkably increased, the split phenomenon caused by perpendicularity deviation of the second-stage diaphragm wall body is avoided, and therefore the waterproof effect and the water stopping effect of the diaphragm wall are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-seepage wall construction, in particular to a modular anti-seepage wall joint structure. Background Art

[0002] With the development of water conservancy and hydropower, the development of water conservancy and hydropower projects has gradually expanded to the western plateau and canyon basins, and the conditions for dam construction have become more and more complex. Generally, an anti-seepage wall is used as the vertical anti-seepage system of the dam. The anti-seepage wall is an underground continuous wall constructed by using mud to protect the wall into a groove, and then pouring concrete or backfilling other anti-seepage materials under the mud. Its function is to achieve an anti-seepage effect. Usually, the anti-seepage wall needs to be divided into a plurality of different unit slots and unit wall sections, and each unit wall section is connected to form an integral anti-seepage wall through joints or joints. At the joint, the pipe pulling method is often used for operation, that is, before pouring concrete in the first phase slot section, joint pipes are placed on both sides of the slot section. After the concrete is initially set, the joint pipes are pulled out by a pipe pulling machine or a crane, thereby forming a smooth semi-cylindrical surface on both sides of the first phase slot section, which is convenient for the construction of the second phase slot section and forms a joint surface here. With the increasing depth of the cut-off wall construction, the joints and pipe joints in the ultra-deep cut-off wall field frequently experience cast pipes and stuck pipes. The slot sections where this phenomenon occurred leaked in the later operation stage. Pure milling joints are prone to excessive deflection of the second-phase slot section during the construction of ultra-deep cut-off walls, resulting in the original soil layer at the joints, which led to leakage in the later operation stage; therefore, it is necessary to design a modular cut-off wall joint structure to solve the above problems. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a modular anti-seepage wall joint structure, which solves the problem that the joint pipe joints in the prior art during the construction of anti-seepage walls frequently have cast pipes and stuck pipes in the field of ultra-deep anti-seepage walls, and such trough sections are prone to leakage in the later operation stage, and has the characteristic of effectively improving the anti-seepage performance of the anti-seepage wall.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a modular anti-seepage wall joint structure, including multiple transverse short walls, the transverse short walls include first transverse short walls at both ends and multiple second transverse short walls in the middle; a first-phase anti-seepage wall is arranged between the first transverse short wall and the adjacent second transverse short wall, and a second-phase anti-seepage wall is arranged between two groups of adjacent second transverse short walls.

[0005] Preferably, the first transverse short wall is a C-shaped structural cross-section with a groove at one end.

[0006] Preferably, the second transverse short wall is two sets of parallel vertical walls, which are respectively connected to both sides of the first-phase anti-seepage wall and the second-phase anti-seepage wall.

[0007] Preferably, a TRD method wall is arranged outside the transverse short wall to reinforce the original soil on both sides of the wall.

[0008] Preferably, a guide wall is built on the top of the TRD construction method wall.

[0009] Preferably, the axis of the transverse short wall is perpendicular to the axis of the first-phase cut-off wall and the second-phase cut-off wall, and has the same depth as the first-phase cut-off wall and the second-phase cut-off wall.

[0010] The utility model has the following technical effects:

[0011] Compared with the prior art, the utility model has a reasonable design. The novel C-shaped anti-seepage wall joint transverse short wall is a plastic concrete structure, which is beneficial for the first-phase anti-seepage wall and the second-phase anti-seepage wall to cut the transverse short wall to form a C-shaped anti-seepage wall joint. The entire joint area is contained in the transverse short wall, which greatly improves the anti-seepage performance of the anti-seepage wall. Through the pre-construction of the transverse short wall, the seepage path is significantly increased, and the splitting phenomenon of the second-phase anti-seepage wall caused by the verticality deviation is avoided, thereby greatly improving the waterproof and water-stopping effects of the anti-seepage wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0013] Figure 1 This is a schematic diagram of the C-shaped overall structure of the utility model;

[0014] Figure 2 This is the layout diagram of the TRD cement soil wall of the utility model;

[0015] Figure 3 This is a schematic diagram of the guide wall structure of the utility model;

[0016] Figure 4 This is a schematic diagram of the guide plate structure of the utility model;

[0017] Figure 5 This is a schematic diagram of trenching of the first phase anti-seepage wall of the utility model;

[0018] Figure 6 This is a schematic diagram of trenching of the second phase anti-seepage wall of the utility model;

[0019] Figure 7 It is a schematic diagram of the construction of a horizontal short wall specifically implemented in the present utility model;

[0020] Figure 8 It is a schematic diagram of the construction of the first phase of the anti-seepage wall specifically implemented in the utility model;

[0021] Fig. 9 It is a schematic diagram of pouring the first phase of the anti-seepage wall specifically implemented in the utility model;

[0022] Fig.10It is a schematic diagram of the construction of the second phase anti-seepage wall specifically implemented by the utility model;

[0023] Fig.11 It is a schematic diagram of pouring the second phase anti-seepage wall specifically implemented by the utility model;

[0024] Explanation of the numbers in the figure: transverse short wall 1, first transverse short wall 11, second transverse short wall 12, first-phase anti-seepage wall 2, second-phase anti-seepage wall 3, TRD method wall 4, guide wall 5, guide plate 6, first-phase anti-seepage wall cutting transverse short wall area 7, first-phase cutting rear area 8, second-phase anti-seepage wall cutting transverse short wall area 9, second-phase cutting rear area 10, first-phase anti-seepage wall first cut position 21, first-phase anti-seepage wall second cut position 22, first-phase anti-seepage wall third cut position 23, second-phase anti-seepage wall first cut position 31, second-phase anti-seepage wall second cut position 32, second-phase anti-seepage wall third cut position 33. DETAILED DESCRIPTION

[0025] Embodiment 1:

[0026] like Figure 1 to Figure 6 As shown, a modular anti-seepage wall joint structure includes multiple transverse short walls, the transverse short walls include first transverse short walls at both ends and multiple second transverse short walls in the middle; a first-phase anti-seepage wall is arranged between the first transverse short wall and the adjacent second transverse short wall, and a second-phase anti-seepage wall is arranged between two groups of adjacent second transverse short walls.

[0027] Preferably, the first transverse short wall is a C-shaped structural cross-section with a groove at one end.

[0028] Preferably, the second transverse short wall is two sets of parallel vertical walls, which are respectively connected to both sides of the first-phase anti-seepage wall and the second-phase anti-seepage wall.

[0029] Preferably, a TR construction method wall is arranged outside the transverse short wall to reinforce the original soil on both sides of the wall.

[0030] Preferably, a guide wall is built on the top of the TR construction method wall.

[0031] Preferably, the axis of the transverse short wall is perpendicular to the axis of the first-phase cut-off wall and the second-phase cut-off wall, and has the same depth as the first-phase cut-off wall and the second-phase cut-off wall.

[0032] Embodiment 2:

[0033] like Figure 7~Figure 11 As shown, the construction method of the modular anti-seepage wall joint structure comprises:

[0034] S1, the TRD method wall is used to reinforce the original soil on both sides of the pre-built wall; the TRD edge line overlaps the transverse short wall, the first-stage anti-seepage wall and the second-stage anti-seepage wall by 5cm, and the reinforcement depth is 15-25m;

[0035] S2, build a guide wall on the top of the TRD construction wall:

[0036] Before the guide wall is built, it is necessary to excavate to the top of the TRD construction method wall and perform roughening. The guide wall is built on the TRD construction method wall and adopts a cast-in-place reinforced concrete structure;

[0037] S3, lateral short wall trenching construction:

[0038] The horizontal short wall is arranged with the joint of the first-phase anti-seepage wall and the second-phase anti-seepage wall as the center. The groove is made by single knife, and the groove making process adopts the groove making process combined with milling, grabbing and milling. The TRD construction method adopts double-wheel milling for groove making within the wall height range, grabbing for groove making in the middle, and double-wheel milling for groove making at the bottom.

[0039] S4, horizontal short wall hole cleaning and slurry replacement;

[0040] S5, concrete pouring of transverse short walls;

[0041] S6, first phase anti-seepage wall trenching construction:

[0042] The first phase of the anti-seepage wall grooves are made by three cutters. The first and second cutters are made by pure milling technology, and the third cutter is made by a combination of milling, grabbing and milling. The first and second cutters mill the concrete of the horizontal short wall with a length of 85cm.

[0043] S7, first phase anti-seepage wall joint scouring:

[0044] S8, first phase anti-seepage wall hole cleaning and slurry replacement;

[0045] S9, guide plate installation;

[0046] S10, pouring of concrete for the first phase of the anti-seepage wall;

[0047] S11, guide plate removal;

[0048] S12, trenching construction of the second phase anti-seepage wall;

[0049] S13, scouring of joints of the second-stage anti-seepage wall;

[0050] S14, cleaning holes and replacing slurry in the second phase anti-seepage wall;

[0051] S15, pouring of concrete for the second phase anti-seepage wall.

[0052] Preferably, in step S7, after the trenching of the first-phase anti-seepage wall is completed, a flushing device is used to flush the joints.

[0053] Preferably, in step S9, the guide plate is made of steel structure, the guide plate is 12m long, the width is the same as the thickness of the first-phase anti-seepage wall and the second-phase anti-seepage wall, and the thickness is 10cm; it is installed at the joint of the first-phase anti-seepage wall and the second-phase anti-seepage wall before the first-phase anti-seepage wall is cast to guide the grooving of the second-phase anti-seepage wall.

[0054] Preferably, in step S12, three cutters are used to form grooves for the second phase anti-seepage wall. The first and second cutters are made by pure milling technology, and the third cutter is made by a combination of milling, grabbing and milling technology. The first and second cutters mill concrete with a length of 75 cm for the transverse short wall and concrete with a length of 10 cm for the first phase anti-seepage wall.

[0055] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. Modular anti-seepage wall joint structure, characterized by: The invention comprises a plurality of transverse short walls (1), wherein the transverse short walls (1) comprise first transverse short walls (11) at two ends and a plurality of second transverse short walls (12) in the middle; a first-stage anti-seepage wall (2) is arranged between the first transverse short wall (11) and the adjacent second transverse short wall (12); and a second-stage anti-seepage wall (3) is arranged between two groups of adjacent second transverse short walls (12); and the first transverse short wall (11) is a C-shaped structural cross-section with a groove at one end.

2. The modular anti-seepage wall joint structure according to claim 1, characterized in that: The second transverse short wall (12) is two sets of parallel vertical walls, which are respectively connected to both sides of the first-stage anti-seepage wall (2) and the second-stage anti-seepage wall (3).

3. The modular anti-seepage wall joint structure according to claim 1, characterized in that: A TRD method wall (4) is arranged outside the transverse short wall (1) to reinforce the original soil on both sides of the wall.

4. The modular anti-seepage wall joint structure according to claim 3, characterized in that: A guide wall (5) is built on the top of the TRD construction method wall (4).

5. The modular anti-seepage wall joint structure according to claim 1, characterized in that: The axis of the transverse short wall (1) is perpendicular to the axis of the first-stage anti-seepage wall (2) and the second-stage anti-seepage wall (3), and has the same depth as the first-stage anti-seepage wall (2) and the second-stage anti-seepage wall (3).

Images